Fast and simple
email relaying solution

MailerIO is a tiny, yet powerful, SMTP relay server with an awesome web dashboard that brings routing, Webhooks and more to your relay needs.


Fast email batch sending

Don't saturate your SMTP servers with individual requests to connect and send. Give them a break with MailerIO. Digest your email and re-route them using batch sessions. MailerIO’s powerful rules can be applied to incoming email to transform recipients and more.

The best security practices from scratch

MailerIO integrates a firewall table and rejects all incoming connections, avoiding spam and bots. You choose whether connections can be used with credentials or IP filtering with SSL.

Modernize your legacy apps

Transform emails into Webhooks calls and bring legacy applications previously limited to email output to post web requests with just a few clicks.


System Requirements

OS: Windows 2012 or better
Processor: 1.4 GHz x64
RAM: 512 MB
Storage: 500 MB
.NET Framework: 4.7.2
* Internet Explorer is not supported.
* IIS is not required to run our Webserver.



Free Trial*

* Free version capped to 50 usages.

Buy the full version now for only $19.99 per year.

Setup and tech support is offered separately of any of our licensing programs.
Individual Server Licenses.