Error 536 - ESMTP Message too large

Description of problem

This error is returned if the message you are trying to send is too large. The default maximum message size is 15MB but it is important to note that emails grow in size when sent via any SMTP server - for more information on why messages grow please see - Why do my messages grow in size when I send them via AuthSMTP?

How to resolve this problem

There are 3 ways to resolve this problem:

  • Increase the maximum message size allowed on your account - you can do this via the control panel
  • Reduce the size of your attachment/s by compressing them with ZIP or a similar archiving tool
  • If you are sending multiple attachments try splitting them apart and send them each in a separate email