Best bulk email senders in 2026: 10 mass email services compared

Bulk email senders are platforms that businesses use to send large email batches without losing control of deliverability. These platforms handle authentication, IP reputation, and bounce processing that determine whether a campaign lands in the inbox or spam. The category goes by several names, like bulk email service, mass email service, and bulk email software,  and they all mean the same thing. Standout providers include:

1. Omnisend for ecommerce-native automations
2. Sender.net for cost-effective WooCommerce/Shopify sync 
3. Brevo for unified marketing and transactional streams 
4. Mailchimp for deep Shopify/WooCommerce behavioral triggers 
5. GetResponse for AI product recommendations 
6. HubSpot for CRM-centric revenue attribution 
7. SMTP.com for guided IP warming
8. Mailgun for developer-first APIs and IP pools 
9. Postmark for stream-isolated transactional delivery 
10. Mailtrap for separate bulk/transactional streams with built-in testing

Sending emails to a 50,000-contact list via the wrong provider can result in emails landing in spam folders and losing revenue. Rebuilding sender reputation takes time and resources, so choosing the right bulk email sender becomes more important than just selecting one based on pricing alone. 

Google and Microsoft announced authentication requirements (in 2024 and 2025, respectively) and complaint-rate monitoring, changing the definition of a good bulk email sender. Today, the best mass email tools offer high send limits, automation, segmentation, and ecommerce features so that you can add products directly to your emails. 

We’ve reviewed and analyzed 10 different bulk email sending providers and evaluated each one based on features, pricing, free plan availability, and ecommerce integrations. 

What is a bulk email service provider?

A bulk email service provider is a platform or software that sends large volumes of email on your behalf and manages the technical requirements behind the scenes.

To make sure your emails land in recipients’ inboxes rather than spam folders, bulk email sending providers authenticate your domain, monitor sender reputation, and handle bounces and unsubscribes. 

Bulk email sender vs. bulk email service: is there a difference?

The difference between bulk email sender and bulk email service depends on the source. Online marketing sources often use the terms interchangeably when referring to a professional service businesses use to send large email batches. 

However, bulk email sender can also be used to describe desktop software that runs locally on computers. In contrast, bulk email service refers to a solution that provides the sending infrastructure. 

The three types of bulk email service providers

Most bulk email service providers fall into three categories: marketing platforms, email APIs and relays, and CRM suites. On the surface level, all three categories are hosted solutions and work towards delivering the same goal, email deliverability, but approach it from slightly different perspectives. 

The choice between all three categories depends on who’s sending the emails and what for. For example, an ecommerce brand’s marketing team running weekly promotions might use a marketing platform with a visual builder and segmentation. In contrast, a large corporation with a strong sales team using a CRM might prefer to integrate email sends into the CRM. 

Hosted platforms vs. desktop bulk email software

Hosted platforms and desktop software are two different ways to manage bulk email sending. However, while hosted platforms live online, desktop bulk email software requires local installation to send emails through an SMTP account provided by you. 

Another major difference between hosted platforms and desktop solutions, as hosted platforms typically provide and own the sending infrastructure. 

One of the biggest reasons why some businesses choose desktop bulk email software is to control the email sending infrastructure and avoid paying a service subscription. By owning the email sending process yourself, you can keep your contact list on a machine instead of a hosted vendor’s server. 

At the same time, being responsible for your entire email sending process comes with specific trade-offs: 

• You have to monitor and ensure your IP reputation and IP warm-ups
• You have to handle bounce processing and unsubscribes
• You have to manually plan and execute every email sending batch 

In the end, while desktop bulk email software gives you more control, it also means handling everything yourself. 

Bulk vs. transactional vs. graymail

Bulk, transactional, and graymail emails are all interconnected at different levels. Bulk emails are sent in large batches to an opted-in list only, like newsletters or promotional campaigns. Transactional emails are triggered by a user action or account event, such as placing an order or requesting a password reset.

Several providers in this list, Mailgun, Postmark, SMTP.com, and Mailtrap, are built primarily for transactional email sending, but each one also offers bulk sending capabilities worth considering for different use cases. 

Graymail sits somewhere between bulk and transactional emails. Like the other two types, graymail is also sent to an opted-in email list, but the list consists of either inactive or irregular recipients who might’ve signed up for a newsletter but don’t actually read it. 

Delivery vs. deliverability

Delivery and deliverability might sound like the same thing. Delivery refers to a message that reaches the receiving mail server, while deliverability is a metric that evaluates whether emails land in recipients’ inboxes or spam folders. 

This distinction is important because a bulk email sending provider can have a high delivery rate but low deliverability due to a large number of emails landing in spam. 

How we tested these bulk email service providers

To build this list for 2026, we compared each mass email service on the factors that matter most for real-world sending: monthly sending limits, what’s included on the free plan, automation depth, segmentation options, and how convenient the platform is to use day-to-day. We also checked pricing models (contact-based vs. volume-based) to see how costs change as your list or sending volume grows.

To validate the feature claims, we reviewed product documentation and plan pages, examined recent user feedback on review platforms, and referenced up-to-date screenshots of key areas like email builders, reporting dashboards, and automation screens.

Only services that offered dependable bulk sending and clear value for specific use cases made this list. Mainly, ecommerce marketing, small business newsletters, and developer-driven email workflows.

Comparison of bulk email service providers 

Ten bulk email service providers make this comparison: Omnisend, Sender.net, Brevo, Mailchimp, GetResponse, HubSpot, SMTP.com, Mailgun, Postmark, and Mailtrap. 

We selected these ten based on sending limits, free-plan terms, automation depth, ecommerce integrations, and deliverability controls rather than brand size. The table below sets out those facts side by side, and the two that follow break down deliverability controls and ecommerce integrations across all ten.

DISCLAIMER: All G2 and Capterra ratings are based on different review numbers. Data collected in September 2026.

Deliverability controls by provider

All ten providers support basic authentication and offer dedicated IP,  but the variations appear once we analyze separate sending stream capabilities and IP warm-up. 

Data collected in September 2026

Ecommerce integrations by provider

Native ecommerce integrations are by far the clearest differentiator, with marketing-focused providers offering several integrations, while others only have a few. 

Data collected in September 2026

In-depth: 10 best bulk email senders and service providers

Omnisend, Sender.net, Brevo, Mailchimp, and GetResponse lead this list for marketing campaigns; Mailgun, Postmark, SMTP.com, and Mailtrap for API and relay sending; HubSpot for CRM-led teams. 

Each review below covers pricing, free plan limits, ecommerce integrations, and the specific use case the provider wins, so you can match one to your own volume and stack rather than to a ranking position.

1. Omnisend

Omnisend is a standout mass email platform for ecommerce because it doesn’t treat “bulk sending” as the whole job. The platform includes ready-to-go automations for welcome, cart, and browse follow-ups, targeted audience segmentation, and sales reporting based on campaign performance. 

The drag-and-drop editor supports product blocks and dynamic content, and A/B testing is available for optimizing sends. Overall, Omnisend is the bulk email sender to choose when every campaign needs to pull product data from your store and report back the revenue it earned.

Pros

• Standard features are available on the free plan
• Accessible to businesses of all sizes
• 24/7 customer support on all plans

Cons

• Limited contacts and monthly email sends on the free plan 
• Doesn’t integrate with all CRM platforms

Customer reviews of Omnisend mass email service

Recent G2 reviews in 2026 frequently highlight usability and support. One reviewer (March 2026) described the platform as having an “easy-to-navigate user interface” and praised the “great support.”

Another reviewer (January 2026) specifically called out the switch experience, saying the “migration from Klaviyo was smooth” and that support replied “within a few minutes” when questions came up — a practical plus if you’re moving your bulk email service from another platform.

2. Sender.net

Free-plan volume is the reason why Sender.net is on this list. It allows 15,000 emails a month to 2,500 contacts with no daily cap, which is the largest free allowance in this comparison. Smaller teams often choose it for newsletters and promotions before committing to a paid plan or other mass email sender. 

Sender’s ecommerce reporting tracks order revenue and email-to-sale attribution through its Shopify and WooCommerce plugins. All in all, small teams sending up to 15,000 emails a month with no daily cap will find Sender.net the most generous free bulk email service in this comparison.

Pros

• Ensures email deliverability via its high IP reputation
• Beginner-friendly
• Supports automation, personalization, and segmentation on the free plan

Cons

• Offers fewer integrations than competitors
• Limited design flexibility for email templates and forms
• Lacks advanced ecommerce tools

Customer reviews of Sender.net mass email service

One G2 reviewer (dated 1/13/2026) praised Sender’s “incredibly responsive support team,” adding that “even as a free user, I received quick and friendly assistance.” Another G2 reviewer (dated 2/15/2026) noted that “automation flows are straightforward to set up” and that “email delivery has been consistently reliable” for their campaigns.

3. Brevo

Brevo primarily prices its plans based on emails sent, rather than contact count. This is particularly beneficial for brands with a large database but low sending frequency, making it possible to pay for the actual sends without including inactive subscribers. 

Brevo integrates with Shopify and WooCommerce, and campaigns can include product blocks directly from synced catalogs. Once those events are wired up, attribution runs at the order level, though setup is more manual than on platforms that sync store data automatically.

Brevo is a mass email service for brands with a large database and a light send schedule. Brands pay for what they send, not for the contact lists with inactive addresses.

Pros

• Supports multi-channel messaging 
• Includes basic automation tools at all levels
• Integrates with Google Analytics 4 for marketing performance monitoring

Cons

• Free plan lacks advanced reporting capabilities
• Basic email templates and customization compared to competitors
• Limited integrations with ecommerce platforms

Customer reviews of Brevo mass email service

Recent reviews often praise Brevo’s usability and value, but mention feature gating. One G2 reviewer (2026) highlighted that they “wish landing pages were available at a lower tier,” pointing to plan restrictions as their main drawback.

Another G2 reviewer (2026) praised Brevo for segmentation and personalization, noting it helps them “communicate… in a personalized way” across different audience groups.

4. Mailchimp

Teams already building in Mailchimp have the strongest reason to stay. It includes a large design template library and integrates with several ecommerce platforms, making it easier for brands who already use the service to build campaigns. 

It differs from ecommerce-first tools because it’s not built around store-triggered workflows and revenue attribution by default. However, Mailchimp offers store-triggered journeys with the Standard plan, and higher paid plans include welcome and follow-up sequences. 

For small businesses running general newsletters across a mixed list, Mailchimp is the bulk email software that leads on template range and integration breadth rather than store-triggered automation.

Pros

• User-friendly with excellent template design
• Integrates well with multiple third-party apps
• Allows customers to personalize customer journeys 

Cons

• Limited customer support on the free plan
• Most features are locked behind the premium plan
• It can become expensive as your contact list grows

Customer reviews of Mailchimp mass email service

A 2026 G2 reviewer praised the all-in-one workflow, saying the UI is “intuitive” and that automated customer journeys “save me hours” of manual work each week.

In the same 2026 review thread, customers mentioned some concerns with pricing and reporting. The reviewer noted that analytics can feel inconsistent “for the high price point,” especially since Mailchimp may “charge for inactive contacts.”

5. GetResponse

If you’re running a business and need a service that bundles webinar hosting and a landing page builder together with email sending, GetResponse offers just that. This mass email sender provides a unique blend of features for running lead-generation funnels. 

GetResponse’s AI-assisted content tools, template library, and drag-and-drop builder with built-in image editing, automation workflows for tagging and scoring, and ecommerce features appeal to marketing teams. 

Because GetResponse integrates webinars, landing pages, and campaign sending into one account, it is the bulk email service provider for teams running full funnels.

Pros

• Wide range of features
• Advanced automation tools and email personalization
• Offers a 30-day free trial on all paid plans

Cons

• Has a slight learning curve, but the tutorials may help
• Paid plans can be costly for small teams

Customer reviews of GetResponse mass email service

G2 reviews in 2026 often highlight the platform’s “all-in-one” appeal. One reviewer (Jan 2026) talks about how it “combines email marketing, automation, landing pages, webinars” in one tool, reducing the need for multiple platforms.

At the same time, reviewers point out real tradeoffs. A Feb 2026 reviewer noted that “the reporting dashboard could be more intuitive,” and mentioned that some templates feel dated.

6. HubSpot

HubSpot sends email directly from businesses’ contacts and deal records from a CRM, so sales-led brands and organizations can track campaigns and see the pipeline status from a single view. Its main advantage is that email marketing lives inside the same database as your sales pipeline, lifecycle stages, and customer history. 

If your team already runs sales and marketing in HubSpot, mass emailing becomes a natural extension. You can segment based on CRM properties and push campaigns without juggling multiple systems. 

HubSpot works as a mass email sender that segments on CRM properties and reports back at the deal level, so it’s best for companies where email has to live in the same database as the sales pipeline.

Pros

• The Marketing Hub unites different tools into one system
• Powerful automation capabilities for streamlining workflow
• Doesn’t take long to launch, especially if you already use HubSpot CRM

Cons

• Advanced features are locked in higher-tier plans
• Limited email template customization
• It can be overkill for small teams

Customer reviews of HubSpot mass email service

G2 reviewers in 2026 often praise the ease of use for email creation. One reviewer noted the email builder is “one of the easier ones to use,” especially for teams sending frequent campaigns.

Meanwhile, reviewers frequently mention that the platform has a bit of a learning curve. Another reviewer said that while HubSpot is powerful, it “takes time to fully learn everything,” particularly if you’re adopting multiple hubs at once.

7. SMTP.com

SMTP.com is an email relay service built for teams that care most about infrastructure and inbox placement at scale. It offers volume-based sending with a dedicated IP and real-time visibility into delivery rates.

Though it lacks campaign-building and ecommerce automation features, it handles transactional emails, product notifications, and high-volume programmatic sending. Above roughly 100,000 emails a month, SMTP.com works as a bulk email sending service organized around dedicated IPs and real-time delivery data rather than campaign design.

Pros

• Optimized for fast, large-scale delivery
• Scale email volume up or down, depending on business conditions
• Suitable for transactional emails and updates

Cons

• No drag-and-drop builder 
• Limited marketing automation tools
• Not ideal for beginners or design-focused campaigns

Customer reviews of SMTP.com mass email service

On G2, reviewers often describe SMTP.com as a strong fit for high-volume sending,  but less attractive for small senders. One reviewer noted that pricing “might be high” if you’re “sending only a few thousand emails monthly.”

On Trustpilot (March 2026), a reviewer complained about account cancellation, saying: “You cannot cancel your account directly” and referencing a “30-day notice policy.”

8. Mailgun

For developers who need a secure system for transactional email, Mailgun is an email API built to fire order confirmations, password resets, and other event-driven messages from application code.

Mailgun works best when email lives inside your product: verification emails, password resets, order updates, or high-volume notifications generated by your app. That control over sending, tracking, and deliverability monitoring costs engineering time to set up. 

Developers who trigger email from application code get more from Mailgun than from a marketing-led bulk email sender, because its APIs, event logs, and IP pools expose the sending layer directly.

Pros

• Full developer control over email functionality
• High deliverability and speed
• Scalable for large applications or services

Cons

• Short message retention period 
• Not suitable for non-technical teams
• Pricing can rise with increased usage

Customer reviews of Mailgun mass email service

G2 reviewers in 2026 often mention that Mailgun has clear navigation for a developer tool. One reviewer highlighted that the interface is “simple” and includes clear paths to access logs and key settings when troubleshooting delivery issues. Plus, 2026 reviews appreciate the ability to diagnose issues via events and logs.

9. Postmark

If you’re looking for a solution that allows you to clearly differentiate between transactional and bulk emails, Postmark separates them by default to protect transactional email deliverability. It also handles limited broadcast sending and is primarily designed for speed and reliability, supported by detailed documentation and webhook support. 

To clarify, Postmark isn’t built for segmentation, marketing automation, or newsletters. Postmark earns its place as a bulk email service for product teams whose transactional messages must never queue behind broadcast traffic, which is what its separate message streams are for.

Pros

• Exceptional delivery speed for transactional emails
• Retains logs for up to 45 days
• In-depth documentation for seamless integration

Cons

• Customer service may take time to respond
• Lacks automation or list segmentation features
• Pricier than bulk services that offer more features

Customer reviews of Postmark mass email service

In 2026 reviews, people consistently praise deliverability. One G2 reviewer described Postmark as “easy to set up” with “great delivery and clean IPs,” which is exactly what product teams want for transactional messaging.

Another 2026 reviewer mentioned Postmark’s reputation in transactional email, calling it “one of the best in the transactional email world,” reinforcing that it’s designed for system and product emails rather than marketing blasts.

10. Mailtrap

Originally, Mailtrap started as an email testing environment for developers and QA teams who needed to preview emails safely and find delivery issues before sending. That being said, Mailtrap also offers Email API/SMTP plans for sending emails in production, making it a flexible option for teams that want testing and sending under one roof. 

Testing before sending is what puts Mailtrap on this list: it is bulk email software that pairs a sandbox environment with production Email API/SMTP on separate bulk and transactional streams.

Pros

• Adheres to security standards and GDPR requirements
• Includes  good deliverability monitoring and optimization tools
• Fast support from tech experts

Cons

• No free trial periods for the paid plans
• Email size is limited to 10MB in the lower-tier plans

Customer reviews of Mailtrap mass email service

In 2026, Mailtrap reviews consistently highlight the platform’s testing capabilities. One G2 reviewer noted that Mailtrap makes email testing “easy even for non-coders,” which is a strong sign that the UI is accessible beyond engineers.

Reviewers appreciate the workflow improvement: a 2026 review described Mailtrap as turning what used to be “a complex task into a hassle-free experience,” especially for teams validating templates and troubleshooting sends before going live.

What is the best platform to send bulk email?

The best bulk email senders have native integration capabilities with one or a few main ecommerce platforms like Shopify, WooCommerce, or BigCommerce, as well as testing, segmentation, and automations. But in practice, this depends on your brand profile and needs. 

Ecommerce brands will benefit the most from dedicated platforms that include native integrations like Omnisend, while brands focused on strong transactional email performance can get more from an API like Mailgun or Postmark. Alternatively, if you’re using a CRM and want to integrate bulk email sends, HubSpot is the best option for you. 

Compare sending limits and pricing structure

Check each platform’s email and contact limits. A generous allowance can be a great deal, or irrelevant if the plan locks key features behind upgrades. Some providers offer high sending capacity but restrict automation, segmentation, or even basic scheduling. 

Before you decide, consider price scaling. Most mass email services charge by contacts, others by emails sent, and some mix both. 

Data collected in September 2026

Don’t rely too heavily on quoted deliverability rates

Many providers advertise a deliverability rate in the 95–99% range. Inbox placement depends far more on your own sending behavior than on that number: your domain reputation, authentication (SPF/DKIM/DMARC), list quality, engagement, and how spammy your creative looks.

Deliverability benchmarks are useful for ruling out weak infrastructure, but it’s best not to prioritize it as your main metric. Even the best mass email software can’t guarantee inbox placement if you’re emailing cold lists or repeatedly sending to unengaged subscribers. 

What moves deliverability is authentication, list hygiene, and relevance, not send volume or cadence on their own. A high-frequency sender mailing a clean, engaged list will outperform an occasional sender mailing a stale one. 

Think beyond sending in bulk

Bulk sending is a major marketing and business strategy, one that can seriously influence end results. A strong mass email service should make it uncomplicated to build good-looking emails, personalize content, segment audiences, and automate follow-ups,  not just push volume.

If you’re an ecommerce brand, also check for store integrations and ready-to-use automations. For example, abandoned cart and browse follow-ups can do more for revenue than another weekly newsletter. If you’re more technical (or sending from an app), you may care more about APIs, dedicated IP options, and separate sending streams.

Prioritize the reporting you’ll actually use

Focus on three main reports that have direct influence over your future sends: revenue-per-campaign, product-level click data, and unsubscribe trends by segment. These three points will help you get a better understanding of your bulk send performance to adjust your strategy or pivot if necessary. 

Reporting is what turns bulk sending from “spray and pray” into an optimized system. If you can’t see what worked (and why), you’ll end up repeating the same mistakes, even with a great tool.

How to send bulk email in 6 steps

Sending mass emails to a varied list of contacts requires accurate segmentation, full authentication, IP and email warm-up, and continuous monitoring and testing. The process itself is much more detailed and, depending on your business and needs, more complex. However, this six-step rundown effectively summarizes the main steps. 

1. Choose a provider that matches your volume: Free-plan contact limits vary widely, from a few hundred contacts to several thousand. If you have more than 10,000, you’ll likely need a paid tier 
2. Authenticate your sending domain: Set up SPF, DKIM, and DMARC before the first send 
3. Import and clean your list: Remove invalid or inactive addresses before sending to avoid bounce and spam-complaint rates
4. Segment before you send: Group contacts by purchase history, engagement, or signup source
5. Warm up if the domain is new: Start with small sends to your most engaged contacts and increase volume gradually 
6. Send, then read the deliverability report rather than only the open rate: Check inbox placement and spam complaints

Is there a free bulk email service?

There are a few free bulk email services, and Omnisend, Sender.net, Brevo, GetResponse, HubSpot, and Mailchimp all offer different free service variations. Other examples that aren’t on the list include providers like MailerLite and a few others. 

Free plan limits by provider

Top free bulk email services by use case

If your main goal is bulk email sending without paying upfront, Sender.net is one of the most generous options to start with. This provider has a free plan that lets you email a large list every month with access to a drag-and-drop editor, list segmentation, and automation workflows. 

For small teams that want to run newsletters or promos at scale before committing to a paid tool, it’s a practical starting point.

If you run an ecommerce store and care more about revenue-driving automation than pure volume, Omnisend is usually the better free-plan pick. 

The free tier has fewer monthly sends, but it includes ecommerce-focused features you’d normally expect to pay for. Namely,  pre-built automations (like welcome and cart recovery), product recommendations, and performance reporting that ties activity back to sales.

 In other words, Sender.net wins for free sending capacity, while Omnisend wins for ecommerce retention features.

The video below explores the top 10 email marketing services that offer email marketing automation and other essential features to help you create an effective email marketing strategy. 

Bulk email sender requirements in 2026: SPF, DKIM, DMARC, and spam rate

Previously, bulk email sender authentication was treated as a best-practice option. In 2024, Gmail introduced several baseline requirements.  

SPF, DKIM, and DMARC

Gmail classifies anyone sending more than 5,000 messages a day to personal Gmail accounts as a bulk sender, and requires SPF, DKIM, and DMARC on the sending domain. One thing to note here is that Google requires a valid DMARC record for bulk senders, with the formal minimum remaining p=none. More mature sending programs should choose p=quarantine as a stronger operational baseline. 

One-click unsubscribe

For marketing and subscription emails particularly, brands need one-click List-Unsubscribe for high-volume sends. Specifically, Gmail requires the RFC 8058 List-Unsubscribe and List-Unsubscribe-Post headers, which dictate that senders must process unsubscribe requests.

Spam rate requirements

Google requires bulk senders to keep the spam rate reported in Google Postmaster Tools below 0.30%, and recommends staying under 0.10%. Crossing 0.30% puts delivery to Gmail accounts at risk.

What your email provider handles and what you need to handle

Your provider handles part of this automatically and leaves the rest to you. Bulk email services publish and rotate DKIM keys, process bounces, and honor List-Unsubscribe headers on your behalf. Publishing SPF and DMARC records on your sending domain, keeping your list clean, and monitoring your spam rate in Google Postmaster Tools stay with the sender.

How to comply with bulk email laws

The recent changes regarding SPF, DKIM, and DMARC authentication are only one part of the entire compliance process for bulk email sends. Brands also need to adhere to local and global laws and policies. 

Before using a mass email service to send an email blast, you must know certain regional laws to avoid fines, protect customer trust, and maintain deliverability. Below are the major regulations, best practices, and a brief compliance checklist.

CAN-SPAM Act (USA)

The CAN-SPAM Act sets the rules for commercial emails in the USA. It doesn’t prohibit mass emailing, but it sets clear rules on how to send emails responsibly:

• Include accurate From, To, and Reply-To header information
• Use clear subject lines instead of clickbait tactics or deceptive phrases 
• Identify commercial messages as advertisements
• Include a clear opt-out option, which is valid for at least 30 days after sending
• Honor unsubscribe requests within 10 business days

GDPR (EU)

The General Data Protection Regulation (GDPR) applies to any business emailing people living in the EU:

• Requires explicit consent, which means you must collect opt-in using a clear affirmative action (for example, checking an unchecked box)
• Recipients must be able to withdraw consent at any time
• You must delete recipients’ personal data upon request

Other international regulations

Besides the United States and the European Union, other regions enforce additional rules, such as:

• CASL: Canada’s anti-spam legislation requires express or implied consent to reduce spam, phishing, and other cyber threats
• PECR (UK): The Privacy and Electronic Communications Regulations are implemented alongside GDPR, covering marketing, cookies, and tracking

Best practices for compliance

Comply with data privacy and communication laws across all regions with these strategies:

• Use a double opt-in process to confirm subscribers’ intent
• Make unsubscribing clear
• Regularly audit your contact list for inactive or unengaged contacts
• Review local laws before sending emails to new regions

Penalties for non-compliance

The table below compares the different email laws to guide you when sending mass emails:

Bulk email examples from Omnisend customers

Omnisend is used by multiple brands globally, and each one comes with its own needs and use case. In terms of bulk email sending, several examples show different approaches with great results. 

1. Salomon

Subject line:【2月6日(金)発売】 RECON CAPSULE｜生まれ変わった3つのモデル

Recipients: 220K

Open rate: 45.5%

Key takeaway: Salomon JP shows how well design and targeting can work together. Their campaigns stay consistent with their brand assets, especially the quality of the hero image, which keeps each send feeling like a premium update rather than “just another newsletter.” 

The brand also doesn’t push every single campaign to everyone. Instead, they actively use segmentation to make sure their messaging reaches the right audience. In the end, this helps to protect engagement and keep content relevant.

2. Ulike Official

Subject line: GET $130 OFF ULIKE’S HOLIDAY SALE

Recipients: 1.7 million

Open rate: 31%

Key takeaway: Ulike shows how to win with bulk sending even when your catalog is small. With fewer SKUs, they rely on the campaign creative to clearly highlight product features and benefits, using the email editor to make the product feel “new” and compelling each time. 

As a global brand, timing matters too, and using time zone-based sending (TZO) helps their newsletters arrive when customers are most likely to read them, instead of hitting inboxes at awkward hours.

3. Kate Backdrop

Subject line: 🎃1+1+1 = 20% Savings!

Recipients: 122K

Open rate: 43%

Key takeaway: Kate Backdrop shows how to run a multi-channel brand. Their emails promote offers and connect everything into a wider “Kate Backdrop network,” linking subscribers to other channels like Facebook groups, loyalty programs, affiliate initiatives, and even offline events. 

On top of that, they use a universal layout approach. Hence, campaigns and automations stay consistent and can be updated across the board, keeping messaging aligned without rebuilding designs every time.

What to do next

Mass emailing is the highest-ROI marketing channel according to the 2026 Ecommerce Marketing Report, but only if you treat it as more than “sending in bulk.” Whatever platform you choose, the fundamentals matter. Choose:

• Omnisend if you need a strong all-in-one ecommerce platform with automations and segmentation
• Sender.net if you don’t want to commit to a paid plan but still get access to key email marketing features
• Brevo if you want volume-based pricing and a single account for both marketing and transactional emails
• Mailchimp if you need a general-purpose platform with a large template library, broad integrations, and A/B testing
• GetResponse if you’re looking for a full-service stack with email, landing pages, webinars, and AI-assisted content tools
• HubSpot if your team runs sales and marketing in one CRM and wants deal-linked segmentation
• SMTP.com if you send over 100,000 emails per month and want to focus on deliverability 
• Mailgun if you’re a developer needing strong APIs, detailed logs/webhooks, and IP pools 
• Postmark if you need fast, reliable transactional delivery with separate message streams
• Mailtrap if you want sandbox testing and production Email API/SMTP with separate bulk and transactional streams

You can start with the free plan and scale up when you’re ready. However, if you’re moving over from Klaviyo or another platform, Omnisend’s migration team rebuilds your setup in five days for free, so there’s no rebuild downtime. For a closer look at how the options compare, check out our breakdown of Klaviyo alternatives.

Bulk email service FAQs