Take away the guesswork
Test out more ideas
Gain insights from performance metrics
Amazing product and support!
"MailerSend is extremely easy to use and super fast to set up. I was able to send the first email via the API in minutes. What's really worth mentioning is the outstanding customer support."
Easy to use API
"It is quite easy to create new templates and send them through the API. Up until now, we didn't have any problems with receiving emails. Plus, the customer support is great!"
Send emails with confidence
"Mailersend was easy to set up and add to my website and I can be sure that my transactional emails go out on time and actually get delivered. The features are perfect for what we need and the system works like a charm!"
Frequently asked questions
What is email split testing?
Email split testing is the process of testing multiple versions of an email or email template to learn which one performs the best.
Which elements should I test?
The subject line and email content are the most common elements to split test. Your email content includes headlines, titles, images and your call to action (CTA). Usually, when performing an email split test, you would change only one element at a time for each version.
Why is email A/B testing important for my transactional emails?
It’s important to optimize your emails for engagement in order to maximize their performance as well as maintain a high level of deliverability. The higher the engagement and the lower the spam complaints, the better your deliverability will be. Email split testing helps by allowing you to gain insights into how different elements perform compared to one another and make adjustments to optimize them.
How many email split tests can users have at the same time?
You can currently carry out 1 split test at a time with up to 5 template versions.
More features to explore
Enjoy the flexibility of sending a few emails or scaling quickly to send a few million.
Intuitively-designed tools allow anyone to contribute, while an advanced infrastructure lets you scale fast.
Use Simple Mail Transfer Protocol when you want to quickly send emails using a reliable Internet standard.
Start sending and tracking your emails with our easy API integration process and clean documentation.
Dynamic email templates
Build one-to-one customer relationships on a mass scale using a single email template.
Verify a single email address or upload an entire email list to verify in bulk.
Control your sendings
Get notified as email events happen so your integration can automatically trigger reactions.
Advanced email tracking
Every email is a learning experience. Monitor your email performance to find what works best.
Manage the unsubscribe page
Whether people are unsubscribing, give them a compelling reason to stay.
Suppression list management
Protect your sending reputation by adding email addresses and domains that you should not send to.
Track the results
Custom HTML template builder
Interested in writing your own HTML code? Our HTML email template editor gives you the flexibility to build exactly what you want.
Drag & drop email template builder
Our drag & drop email editor empowers you to create professionally-designed transactional emails.
Rich-text email editor
Create plain text emails with the formatting capabilities of HTML. Add links, images, bullet points and style text with ease.
Email split testing
Email split testing will improve engagement with your transactional emails by helping you learn what your customers want more.
Control your account
Invite your team members to collaborate on projects by assigning roles and granting permissions.
Streamline your workflow by organizing and keeping all your files in one place in the cloud.
Use multiple domains to manage different brands or products with one MailerSend account.
Take control of your sending reputation with your own dedicated IP address and optimize your sendings for improved deliverability.
MailerSend iOS app
Access email activity, domain settings, and analytics on the go with MailerSend iOS app.
Inbound email routing
Automatically parse incoming emails. Inbound email routes enable MailerSend to receive emails on your behalf, integrating them into your application.
Understand your customers and users on a deeper level and gain valuable insights to help you improve your product and customer experience with surveys.
Start split testing your emails now
Use our email API to start sending emails within your apps. Get started with 3,000 free emails per month! Includes 24/7 help from a friendly and dedicated support team.