Hey, WhatsApp API is here 🎉

Deliver critical alerts faster. Add WhatsApp now.

Hear it from the people who build with us

From startups to SaaS companies to agencies, MailerSend is trusted by thousands of organizations to power their transactional message delivery.
MailerSend solved a deliverability problem that was holding back our entire claims operation, and it did it fast. We were live within 24 hours and sending at scale within the week. It's become a core part of the infrastructure behind how we communicate with our clients, and it just works.
Ryan Biggs Head of IT
MailerSend has been fantastic for our OTA website—fast, reliable, and easy to use. From booking confirmations to guest updates, everything delivers seamlessly. Great service and excellent support!
Craig Mlambo Lead Software Developer
After switching to MailerSend, our e-mail deliverability has increased dramatically across every application we manage. The user experience and support are exceptional. MailerSend has figured out how to do transactional email right!
Dave Buonomo President & CTO - Blue Atlas Interactive

Fast, clean API integration

MailerSend fits right into your stack with libraries for your favorite programming language, while detailed API documentation helps you send emails in minutes.
curl -X POST \
https://api.mailersend.com/v1/email \
    -H 'Content-Type: application/json' \
    -H 'X-Requested-With: XMLHttpRequest' \
    -H 'Authorization: Bearer {place your token here without brackets}' \
    -d '{
        "from": {
            "email": "your@email.com"
        },
            "to": [
        {
            "email": "your@client.com"
        }
        ],
        "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.

" }'
import { MailerSend, EmailParams, Sender, Recipient } from "mailersend";

const mailerSend = new MailerSend({
   api_key: "key",
});

const sentFrom = new Sender("you@yourdomain.com", "Your name");

const recipients = [
  new Recipient("your@client.com", "Your Client")
];

const emailParams = new EmailParams()
  .setFrom(sentFrom)
  .setTo(recipients)
  .setReplyTo(sentFrom)
  .setSubject("This is a Subject")
  .setHtml("This is the HTML content")
  .setText("This is the text content");

await mailerSend.email.send(emailParams);
$mailersend = new MailerSend();

$recipients = [
new Recipient('your@client.com', 'Your Client'),
];

$emailParams = (new EmailParams())
->setFrom('your@email.com')
->setFromName('Your Name')
->setRecipients($recipients)
->setSubject('Subject')
->setHtml('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);
php artisan make:mail ExampleEmail

Mail::to('you@client.com')->send(new ExampleEmail());
from mailersend import emails

mailer = emails.NewEmail()

mail_body = {}

mail_from = {
    "name": "Your Name",
    "email": "your@domain.com",
}

recipients = [
    {
        "name": "Your Client",
        "email": "your@client.com",
    }
]

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

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 = Mailersend::Email.new

# Add parameters
ms_email.add_recipients("email" => "your@client.com", "name" => "Your Client")
ms_email.add_recipients("email" => "your@client.com", "name" => "Your Client")
ms_email.add_from("email" => "your@domain.com", "name" => "Your Name")
ms_email.add_subject("Hello!")
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
ms_email.send
package main

import (
    "context"
    "os"
    "fmt"
    "time"

    "github.com/mailersend/mailersend-go"
)

func main() {
	// Create an instance of the mailersend client
	ms := mailersend.NewMailersend(os.Getenv("MAILERSEND_API_KEY"))

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

	subject := "Subject"
	text := "This is the text content"
	html := "

This is the HTML content

" from := mailersend.From{ Name: "Your Name", Email: "your@domain.com", } recipients := []mailersend.Recipient{ { Name: "Your Client", Email: "your@client.com", }, } // Send in 5 minute sendAt := time.Now().Add(time.Minute * 5).Unix() tags := []string{"foo", "bar"} message := ms.Email.NewMessage() message.SetFrom(from) message.SetRecipients(recipients) message.SetSubject(subject) message.SetHTML(html) message.SetText(text) message.SetTags(tags) message.SetSendAt(sendAt) message.SetInReplyTo("client-id") res, _ := ms.Email.Send(ctx, message) fmt.Printf(res.Header.Get("X-Message-Id")) }
import com.mailersend.sdk.Email;
import com.mailersend.sdk.MailerSend;
import com.mailersend.sdk.MailerSendResponse;
import com.mailersend.sdk.exceptions.MailerSendException;

public void sendEmail() {

    Email email = new Email();

    email.setFrom("name", "your email");
    email.addRecipient("name", "your@recipient.com");

    // you can also add multiple recipients by calling addRecipient again
    email.addRecipient("name 2", "your@recipient2.com");

    // there's also a recipient object you can use
    Recipient recipient = new Recipient("name", "your@recipient3.com");
    email.AddRecipient(recipient);
    
    email.setSubject("Email subject");

    email.setPlain("This is the text content");
    email.setHtml("

This is the HTML content

"); MailerSend ms = new MailerSend(); ms.setToken("Your API token"); try { MailerSendResponse response = ms.emails().send(email); System.out.println(response.messageId); } catch (MailerSendException e) { e.printStackTrace(); } }
MailerSend

SMTP credentials, ready to drop in

Not every project needs an API. Our SMTP relay provides fast, reliable email sending. Just enter your credentials and you’re good to go.

Monitor. Optimize. Deliver.

Get full visibility into sending activity and performance, and optimize deliverability with features that simplify bounce management and troubleshooting.
Real-time email activity

Follow every step of the message journey to quickly identify deferrals and bounces, complete with mail server responses.

API & SMTP logs

Troubleshoot sending issues fast with a full view of your SMTP and API requests and their responses.

Analytics reports

Create reports for your whole account or filter by domain and tags to create individual reports to share with your clients.

Suppressions management

No need to handle bounces, unsubscribes and spam complaints yourself—MailerSend automatically adds them to your suppressions list.

Webhooks

Use webhook notifications about key email and SMS events to set up triggered workflows, monitor delivery, and optimize your delivery logic.

Email verification

Verify recipient email addresses via the API or in app, in bulk or in real time. Keep your database clean and your deliverability optimal.

MailerSend
Award-winning support

Get 24/7 technical support from knowledgeable experts who provide real solutions

Custom template options

Use pre-built email templates or create your own with our Drag & Drop or HTML builder

Team-friendly app

Easily manage team access with RBAC, 2FA enablement, and SSO.

EU-compliant privacy

Send confidently with a GDPR compliant solution that uses EU data centers (ISO 27001).

Explore all features for free

Try the Professional plan free for 14 days, then upgrade to the plan that fits your needs and volume when you’re ready.
How many emails do you plan to send?
3K
Pricing in Euros and British Pounds is for informational purposes only. All billing invoices will be charged in US dollars.
Best value
Professional

For agencies and white-label resellers sending at scale

$88.00 /month
$1,056.00 billed yearly
81.12 /month
€973.39 billed yearly
£68.23 /month
£818.79 billed yearly
$110.00 /month 101.39 /month £85.29 /month
50,000 emails /month
150 SMS /month
400 email verification credits
Extra usage
$0.90 0.90 £0.90 /1,000 emails
$1.40 1.40 £1.40 /100 SMS
Best value
Starter

For growing startups and small businesses

$28.00 /month
$336.00 billed yearly
25.81 /month
€309.71 billed yearly
£21.71 /month
£260.53 billed yearly
$35.00 /month 32.26 /month £27.14 /month
50,000 emails /month
100 SMS /month
100 email verification credits
Extra usage
$0.90 0.90 £0.90 /1,000 emails
$1.40 1.40 £1.40 /100 SMS
Best value
Hobby

For personal projects and side hustles

$ 5.60 /month
$67.20 billed yearly
5.15 /month
€61.83 billed yearly
£4.43 /month
£53.18 billed yearly
$7.00 /month 6.44 /month £5.53 /month
5,000 emails /month
100 email verification credits
Extra usage
$1.50 1.50 £1.50 /1,000 emails
Free

For occasional email testing and sending

Get started for free — includes:
  • 500 emails /month
  • 10 email verification credits
  • Email threads support
  • Drag & Drop email builder

Add-ons

Customize your plan with extra resources as you need them.

Add-on resources illustration
Email verification

Verify email addresses in bulk or real-time.

$25.00

$0.01 per credit

$45.00

$0.009 per credit

$80.00

$0.008 per credit

$120.00

$0.008 per credit

$160.00

$0.008 per credit

$175.00

$0.007 per credit

$300.00

$0.006 per credit

$450.00

$0.006 per credit

$500.00

$0.005 per credit

$600.00

$0.005 per credit

$1,000.00

$0.005 per credit

$1,200.00

$0.004 per credit

$1,500.00

$0.003 per credit

$2,000.00

$0.002 per credit

WhatsApp

Reach customers with transactional text messages. Available in the USA and Canada only.

$5.00

$0.0050 per message

Extra usage: $2.50/1,000

$10.00

$0.0010 per message

Extra usage: $0.50/1,000

$20.00

$0.0004 per message

Extra usage: $0.20/1,000

*Learn more about plan limits.   |   Taxes may apply, learn more.
The platform is intuitive, the documentation is clear, and the reporting gives exactly the insights we need. So far, it’s been very reliable—exactly what you want for transactional emails.
Maurice Arditi •  Head of Automation

Unlock absolutely everything free for 14 days