535 incorrect authentication data

[salmon]

Trying to set the SMTP connector for exchange@mydomain.com and receive this error.

"535 incorrect authentication data"

Anyone know what the issue is?

[David I]

This error may happen in different cases. Some of solutions are below:

A) In root WHM, go to Email > Repair Mailbox permissions (If you have a dedicated server, otherwise support should do that)

B) /etc/userdomains should be checked for blank space or broken line near the domain that is experiencing the problem

C) This might also happen when the option “Allow mail account authentication using the password of the domain owner’s account” in WHM -> Server Configuration -> Tweak Settings is enabled.

If you've got a dedicated server, you may check for solutions above. Otherwise I suggest you opening a trouble ticket so our support will check it.

Also, could you please specify the way you try to set SMTP connector?