A team-friendly Postmark alternative

Meet MailerSend, the Postmark alternative that empowers your entire team to collaborate on transactional email. Access a fast, intuitive UI, responsive templates, and award-winning customer support.

Excellent deliverability, powerful API, complete analytics and fast support. They have a great dashboard with a vast amount of valuable data. The API is very fast to accept emails, delivery is almost instantaneous.
Steffen S. Small-business Owner, Software Company
In the jungle of transactional email services, I just tried MailerSend as an alternative to Mailgun and Postmark, which I’ve previously used. Very good first impressions! Slick UI/UX.
Patrik E. Verified User, @patrikengborg
Super easy API for devs, simple mail templating for designers. I love the fact that we can define data from the dashboard and simply call with the API from the backend to easily send emails. It's awesome!
Very clear dashboard for tracking errors and bounces.
Raphael A. CTO, Verified User

Built for collaboration

Enable users across all teams to log in from their own unique account to send bulk emails, validate email addresses, send SMS, and more while enjoying our fast, user-friendly UI.

Award-winning 24/7 customer support

MailerSend’s friendly customer service team is renowned for its world-class support. No matter which plan you’re on, 24/7 email/live chat support is just a click away so you’ll always get the help you need, when you need it.

93% satisfaction rate
100% response rate
24/7 support hours

Rich library of responsive templates

Choose from our professionally-designed templates and customize them to fit your brand design with the drag & drop email editor - no coding needed! Developers can then simply add the code from the template settings into your workflow.


Customizable user management

Effortlessly add, edit and manage users in the intuitive user management dashboard. Assign predefined roles or customize permissions for individual users’ access to each domain’s settings and analytics.


Reliable email validation tool

Upload your email list and get email verification results in minutes so you can improve deliverability and protect your sender reputation. Or, use the API to identify invalid emails in real-time.


Real-time delivery insights

Advanced email tracking empowers you to draw from real data about email delivery and make decisions without guesswork. Track performance, learn about reading environments, and identify sending issues as they happen.

Powerful API and SMTP relay

Developers can integrate email delivery in minutes with their language of choice thanks to our 7 official SDK libraries. Simply connect our API or SMTP relay
with your app and our secure sending infrastructure will do the rest!
Read our API docs
curl -X POST \ \
    -H 'Content-Type: application/json' \
    -H 'X-Requested-With: XMLHttpRequest' \
    -H 'Authorization: Bearer {place your token here without brackets}' \
    -d '{
        "from": {
            "email": ""
            "to": [
            "email": ""
        "subject": "Hello from MailerSend!",
        "text": "Greetings from the team, you got this message through MailerSend.",
        "html": "

Greetings from the team, you got this message through MailerSend.

" }'
use MailerSend\MailerSend;
use MailerSend\Helpers\Builder\Recipient;
use MailerSend\Helpers\Builder\EmailParams;

$mailersend = new MailerSend(['api_key' => 'key']);

$recipients = [
new Recipient('', 'Your Client'),

$emailParams = (new EmailParams())
->setFromName('Your Name')

Greetings from the team, you got this message through MailerSend.

') ->setText('Greetings from the team, you got this message through MailerSend.'); $mailersend->email->send($emailParams);
const Recipient = require("mailersend").Recipient;
const EmailParams = require("mailersend").EmailParams;
const MailerSend = require("mailersend");

const mailersend = new MailerSend({
    api_key: "key",

const recipients = [new Recipient("", "Your Client")];

const emailParams = new EmailParams()
    .setFromName("Your Name")

Greetings from the team, you got this message through MailerSend.

") .setText("Greetings from the team, you got this message through MailerSend."); mailersend.send(emailParams);
package main

import (


var APIKey string = "Api Key Here"

func main() {
    ms := mailersend.NewMailersend(APIKey)

    ctx := context.Background()
    ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
    defer cancel()

    subject := "Subject"
    text := "Greetings from the team, you got this message through MailerSend."
    html := "

Greetings from the team, you got this message through MailerSend.

" from := mailersend.From{ Name: "Your Name", Email: "", } recipients := []mailersend.Recipient{ { Name: "Your Client", Email: "", }, } variables := []mailersend.Variables{ { Email: "", Substitutions: []mailersend.Substitution{ { Var: "foo", Value: "bar", }, }, }, } tags := []string{"foo", "bar"} message := ms.NewMessage() message.SetFrom(from) message.SetRecipients(recipients) message.SetSubject(subject) message.SetHTML(html) message.SetText(text) message.SetSubstitutions(variables) message.SetTags(tags) res, _ := ms.Send(ctx, message) fmt.Printf(res.Header.Get("X-Message-Id")) }
from mailersend import emails

mailer = emails.NewEmail()

mail_body = {}

mail_from = {
    "name": "Your Name",
    "email": "",

recipients = [
        "name": "Your Client",
        "email": "",

mailer.set_mail_from(mail_from, mail_body)
mailer.set_mail_to(recipients, mail_body)
mailer.set_subject("Hello!", mail_body)

Greetings from the team, you got this message through MailerSend.

", mail_body) mailer.set_plaintext_content("Greetings from the team, you got this message through MailerSend.", mail_body) mailer.send(mail_body)
require "mailersend-ruby"

# Intialize the email class
ms_email =

# Add parameters
ms_email.add_recipients("email" => "", "name" => "Your Client")
ms_email.add_recipients("email" => "", "name" => "Your Client")
ms_email.add_from("email" => "", "name" => "Your Name")
ms_email.add_text("Greetings from the team, you got this message through MailerSend.")
ms_email.add_html("Greetings from the team, you got this message through MailerSend.")

# Send the email

Three ways to build awesome emails

With drag & drop, Rich Text and HTML editors, there’s an email builder for people of all technical abilities. Start with a template or build from scratch and allow other team members to collaborate.


Split testing made easy

Learn from your emails with split testing. Analyze which content, subject lines, images, and CTAs resonate the most with your recipients and tweak your emails to keep improving performance.


Customer text messaging

Create an omnichannel experience for customers by sending important updates via SMS and enabling 2-way conversations with inbound routing.


Powered by deliverability experts

Ensuring emails get delivered is our top priority. MailerSend is dedicated to protecting your sender reputation, reducing bounce rates and spam complaints, and increasing overall email deliverability. We’ll even monitor for blocklist activity.


iOS app for account management on the go

Download the MailerSend iOS app to access important account settings and activity wherever, whenever. View key performance metrics for all your domains, stop/start sending, and edit tracking options from your iOS device.

How MailerSend features compare with Postmark

MailerSend has everything for developers and non-technical teams to contribute to transactional email, including flexible deployment options, simple user management, and a rich library of easy to use templates.
MailerSend Postmarkapp
50,000 emails/month $30 $55
Email API, SMTP relay, webhooks
Inbound routing
Bulk emailing
Suppression management
Email tracking & analytics
Drag & drop template builder
Rich text template editor
HTML template editor
IP pool management
Dedicated IP Available for high-volume senders Available for high-volume senders
Deliverability consultation
Email verification
iOS App
24/7 email support
Live chat support Available for Premium and Enterprise plans
Onboarding assistance
Multiple users
User roles 5 roles and custom options are available 4 roles available
Premium IP pool management
∞ templates 250 for Premium plans, ∞ for Enterprise
30-day data retention 14 days on premium and 30 days on enterprise plan 45 days

How MailerSend prices compare with Postmark

Get started with our Free plan and 3,000 emails/month. You can upgrade at any time to a Premium plan to get more emails, access live chat support, and get premium features. Plus, choose an annual payment plan to save more.
MailerSend Postmarkapp
3,000 emails/month Free $15
50,000 $30 $55
100,000 $60 $115
250,000 $150 $245
500,000 $300 $445
750,000 $450 $495
1,000,000 $580 $695
1,500,000 $825 $775
2,000,000 $1100 Custom
2,500,000 $1,375 Custom
Annual discount 20% None

Frequently Asked Questions

What support is available in case of issues?

All users enjoy friendly 24/7 support—our support team is renowned for its quick response times and detailed answers from real humans. 

Premium users also get access to 24/7 live chat and priority support.

Can I get a dedicated IP?

We offer a dedicated IP add-on for high-volume senders. MailerSend is a robust email delivery platform, so no matter what you choose, you can count on us for optimal deliverability.

Curious about whether a dedicated IP address is right for your business? Get in touch.

How often do you roll out product enhancements?

At MailerSend, we’re constantly working on new features and functionality, as well as improving already existing features. We have ambitious plans and we’re very transparent about the direction MailerSend is heading in—you can count on us to always be a forward-thinking and innovative email service provider. Check out our roadmap for yourself.

Is the setup process complicated?

Our ultimate goal is to take the hassle out of using transactional email service, that’s why we’ve made it easy to set up and maintain.

We provide 7 SDK libraries (PHP, Laravel, Node.js, Golang, Python, Ruby, Java) along with clear, comprehensive documentation that is regularly updated. Developers can simply plug in our email API or SMTP relay and MailerSend will take care of the rest. There’s good news for low-coders too! We have an extensive library of integrations to easily connect your apps.

How will you make my transactional email campaigns secure?

In addition to our secure email infrastructure, our mail servers protect your email sendings with SPF, DKIM and DMARC security protocols. You can be confident that your sending domain is protected from unauthorized sendings and your sender reputation remains intact. With MailerSend, you’ll always get secure email delivery.

Compare MailerSend

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Give MailerSend a try with a free account

Small business, enterprise or startup: Your whole team can quickly start working on transactional emails with no long-term commitments—start with 3,000 free emails per month, then pay as you go!

Step 1

Sign up for a free account

Step 2

Send an email from the trial domain

Step 3

Try out the features & check your activity