Transactional Email and SMS Service

Developers come for the high deliverability and stay because our intuitive API and built-in integrations make life easier.

Start sending API reference

Send 3,000 emails/month for free

Transactional emails

Send with confidence knowing that your emails will get delivered

Transactional SMS

Send qualified SMS text messages to opt-in recipients

Email verification

Keep your domain reputation safe and increase deliverability

See all features

Everything you need to send transactional emails

MailerSend is a comprehensive tool for your everyday business: send invoices, delivery updates, and forgotten password links in seconds, without even thinking about it.

SMTP relay

Plug & play with SMTP to instantly start sending emails from your app or website.

Multiple domains

Use multiple domains to manage different brands or products with one MailerSend account.

Email delivery

Enjoy the flexibility of sending a few emails or scaling quickly to send a few million.

Inbound routing

Receive and integrate incoming emails into your application.

IP allowlist

Restrict API and SMTP requests to a predefined set of IP addresses.

Effortless integration

Choose among 7 SDKs and our email API to seamlessly integrate MailerSend into your stack.

Created for all businesses

MailerSend integrates quickly into your tech stack, scales with your sendings, and ensures that your emails get delivered.

Easiest To Do Business With

The free tier is very generous at 12k emails/month, perpetually. Which makes it perfect for a small size e-commerce or growing online community. Since it has a pay-as-you-go model, you can use it even for higher # of emails without having to commit to higher monthly fees elsewhere (specially for volumes that will go unused).

David S. Director, Installation

Integrate quickly with our API documentation

MailerSend fits right into your stack with libraries for your favorite programming language, while detailed API documentation helps you send emails in minutes.

Read our API docs

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."
    }'

use MailerSend\MailerSend;
use MailerSend\Helpers\Builder\Recipient;
use MailerSend\Helpers\Builder\EmailParams;

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

$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);

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.com", "Your Client")];

const 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.send(emailParams);

package main

import (
    "context"
    "fmt"
    "time"

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

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: "your@email.com",
    }

    recipients := []mailersend.Recipient{
        {
            Name:  "Your Client",
            Email: "your@client.com",
        },
    }

    variables := []mailersend.Variables{
        {
            Email: "your@client.com",
            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": "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

Integrations

Easily connect other web apps with MailerSend so they seamlessly work together to share information, automate workflows and enhance your customer experience.