Sending email to the server fails with error: mail server requires authentication

Created:

2016-11-16 13:09:47 UTC

Modified:

2017-05-05 06:59:44 UTC

0

Was this article helpful?


Have more questions?

Submit a request

Sending email to the server fails with error: mail server requires authentication

Applicable to:

  • Plesk 11.0 for Windows
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Windows
  • Plesk 12.0 for Windows
  • Plesk 12.5 for Windows

Symptoms

Sending email to the server fails with error:

    550 This mail server requires authentication (0) when attempting to send via this SMTP (submission) port

Cause

SMTP service is configured to force all inbound connections to authenticate.

Resolution

Please refer to the following article:

https://www.mailenable.com/kb/Content/Article.asp?ID=me020032

According to the article above, this option is configurable in the MailEnable Administrator console:

ME Admin MMC > Servers > Localhost > SMTP Properties > Inbound > Properties > Port Settings > SMTP Port > "Requires connections to authenticate before sending email"

Or for alternate SMTP port listening:

ME Admin MMC > Servers > Localhost > SMTP Properties > Inbound > Properties > Port Settings > Submission Port > "Requires connections to authenticate before sending email"

Have more questions? Submit a request
Please sign in to leave a comment.