SMTP Authentication

We have enabled SMTP authentication to prevent spammers from using the SMTP (outgoing) server as an open-relay allowing them to freely send any content they desired. We have implemented the feature to prevent the mail server from being blacklisted by other mail servers running anti-spam services which would reject all emails from the server if we were found to be a spammer-friendly haven. This is not acceptable and would impact the service for legitimate users.

To overcome this we had to enable a feature called SMTP Authentication.This basically means that every time an email is sent by the server it asks for the username and password to verify if the user is legitimate. The solution is to enable SMTP-Authentication in your email client.

If this is not enabled on your email client (outlook, thunderbird, etc) you may see the following error:

"error 553, that domain isn't in my list of allowed rcpthosts (#5.7.1)"

Please review our video tutorials at the below link on how to correctly setup your email account to work with our mail servers.

  • 656 Users Found This Useful
Was this answer helpful?

Related Articles

Email Account Client Setup

There are a number of ways to set up mail on an email client like Thunderbird or Outlook. The...

Disable SSL on Iphone Mail App

Disable SSL on Iphone Mail App: Click on Settings Click on Mail, Contacts and Calendars...

Why do my attachments get converted to WINMAIL.DAT

Sometimes you may receive an email with a winmail.dat attachment. This file is sent from people...

What ports can I use to send email via

The correct port to submit mail to a mail server for delivery is 587. These ports would need to...

Some steps to help prevent spam

Nearly everyone has to deal with spam arriving in their inbox. Some people get hundreds a day and...