SMTP relay service built to help emails reach the inbox

Send transactional emails through a straightforward SMTP relay built to support inbox delivery, with clear tracking after every send.

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5.0 on Product Hunt

5.0 on Capterra

4.5 on G2.com

Reliable SMTP relay that’s easier to manage

Send transactional email through SMTP or API, then see what happens after each message leaves your system.

SMTP and Email API

Use SMTP for a familiar setup, or Maileroo’s Email API for a direct connection to your application.

Dedicated IPs

Send higher volumes with fully warmed-up dedicated IPs built to support a healthier sending reputation.

Webhooks

Send live email events into your system as they happen.

Real-time email reports

See delivery issues as they happen, so your team can respond before users are left waiting.

Bounce handling

Reduce repeat sending to hard-bounced addresses and keep your email list cleaner over time.

Domain authentication

Add the SPF and DKIM records Maileroo needs to send authenticated email from your domain.

Send transactional email your way

Send through SMTP or API. Use SMTP for a familiar setup, or connect directly through Maileroo’s Email API. Either way, you can send transactional emails from your app, website, or platform without managing the delivery infrastructure yourself.

SMTP relay service with statistics and analytics

Real-time reports after every send

View delivery activity from one dashboard, including delivered emails, opens, clicks, bounces, and suppressions. Give your team a clearer way to spot failed sends and trace delivery issues.

Clear DNS setup for authenticated sending

Maileroo gives you the SPF and DKIM records your domain needs, with simple setup steps and checks to catch common issues before they affect delivery.

No DNS dramas. Just a cleaner path to sending.

Ready to start sending?

Set up Maileroo, connect your domain, and send up to 3,000 emails per month for free.

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Built for teams that need email to work

Vincent Turner

Founder, UNO

“In 20+ years of having to use mail services for system emails Maileroo is by far the best service I've found. Reliable, fast, great service & support, reporting and a host of small features that you didn't realise you needed until you do! Highly recommended.”

Aarón Blanco Tejedor

CEO, Ubuntu Productions

“My experience has been outstanding. The instructions for adding domains are straightforward and easy to follow. Domain verification is incredibly quick after updating the DNS records, and emails are sent promptly without ending up in spam folders.”

More control over how your emails are sent

Email delivery has a lot of small moving parts. Maileroo keeps them easier to manage, from branded tracking links and email logs to testing before your own domain is ready.

Custom Hostnames

Use your own domain for tracking links and email delivery settings, with automated SSL included.

Email Logging

Trace what happened after an email was sent, with clear logs that show the status of each message - without having to dig through disconnected tools.

Sandbox Domains

Test your setup before connecting your own domain, so you can check the flow without touching DNS first.

Start with 3,000 free emails per month

Try Maileroo with enough sending volume to test your setup properly. No credit card, no long commitment, and no need to upgrade before you know it fits.

Start Sending For Free

Simple SMTP setup for WordPress

Use Maileroo’s WordPress plugin to send site emails through a reliable SMTP relay. It’s built for contact forms, password resets, login emails, WooCommerce notifications, and other messages your site needs to send.

View WordPress plugin

Improved Deliverability with SMTP Relay Service

Built to support stronger deliverability

Maileroo helps you send from authenticated domains, manage bounces, monitor blacklists, and use clean sending practices that support better inbox placement over time.

Switch to Maileroo

A simpler email platform, backed by real reviews

Start free. Scale when you send more.

Choose a monthly email volume that fits your current sending needs. Start with 3,000 free emails, then upgrade when your volume grows.

Pricing That Fits Your Needs

Plan

Quantity

Monthly Price

Free

3,000

Free Get Started

Get Started

Basic

25,000

$10.00 Get Started

Get Started

Starter

50,000

$15.00 Get Started

Get Started

Premium RECOMMENDED!

100,000

$30.00 Get Started

Get Started

Pro

250,000

$72.00 Get Started

Get Started

Ultimate

500,000

$140.00 Get Started

Get Started

Enterprise

1,000,000

$250.00 Get Started

Get Started

Need something even bigger? We've got you covered.

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* Our plans are billed on a monthly basis. If you prefer to pay annually, please contact us for a custom quote.
** Users sending more than 100,000 emails per month can benefit from our dedicated IP address service, available for a monthly fee of $50.

Sending more than 1,000,000 emails per month?

Let’s build a plan around your volume.

Request a demo

Free Dedicated IP for 250K+ Plans

Get Your Free Dedicated IP View Plans

Frequently Asked Questions

What is an SMTP relay service?

An SMTP relay service sends outgoing emails through a dedicated mail server instead of relying on your own server or default website mail settings. It is commonly used for transactional emails like password resets, login codes, receipts, invoices, account alerts, and system notifications.

How does an SMTP relay help with email deliverability?

An SMTP relay helps by sending email through properly configured infrastructure, authenticated domains, and managed sending systems. With Maileroo, you can set up SPF and DKIM, monitor delivery activity, manage bounces, and use reporting tools to spot issues that may affect delivery.

Do I need an SMTP relay service?

You may need an SMTP relay if your website, app, or platform sends important emails that users expect to receive. This includes account emails, password resets, order updates, booking confirmations, invoices, receipts, alerts, and other automated messages.

What authentication methods does SMTP relay use?

SMTP relay services commonly use SMTP authentication, SPF, DKIM, and DMARC to help verify that emails are being sent from an authorised domain. These records help mailbox providers understand that your emails are legitimate and reduce the chance of delivery issues.

Can I send bulk emails using an SMTP relay?

Yes, but your sending must follow anti-spam rules and acceptable use policies. SMTP relay is often used for high-volume sending, but list quality, authentication, bounce handling, and sender reputation still matter.

What is the difference between an SMTP relay and a regular email server?

A regular email server is usually built for standard mailbox sending and receiving. It may not be suitable for application email, transactional email, or higher-volume sending. An SMTP relay service is built to handle outgoing email from apps, websites, and systems, with tools for authentication, tracking, bounce handling, and delivery management.

How can I monitor email performance with Maileroo?

Maileroo provides real-time reports so you can see what happens after emails are sent. You can track delivery activity, opens, clicks, bounces, and suppressions from one dashboard, making it easier to spot failed sends and trace delivery issues.

How do I integrate Maileroo’s SMTP relay with my application?

You can connect Maileroo using standard SMTP credentials in your app, website, email client, or platform. If you prefer a direct integration, you can also use Maileroo’s Email API to send transactional emails from your application.

How does IP warming work with SMTP relay?

IP warming is the process of gradually increasing email volume from a new IP address so mailbox providers can build trust in the sender. This helps support a healthier sending reputation and reduces the risk of sudden volume spikes causing delivery issues.

What is the difference between SMTP relay and API-based email sending?

SMTP relay uses standard SMTP settings, which makes it a familiar option for many apps, websites, and platforms. API-based sending connects your application directly to an email service through an API. It is often useful for developers who want more control over how emails are triggered and managed.

How do I choose the right SMTP relay service?

Look for a service that fits your sending volume, setup needs, reporting requirements, and budget. The right SMTP relay should make it easy to authenticate your domain, send transactional emails, monitor delivery, manage bounces, and scale without unnecessary complexity.

What are some well-known SMTP relay services?

Well-known SMTP relay services include Maileroo, SendGrid, Mailgun, AWS SES, Postmark, SMTP2GO, Resend, and TurboSMTP. Each platform has different strengths, pricing, setup requirements, and reporting tools, so the best choice depends on how your team sends and manages email.

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