Support » Plugin: Post SMTP Mailer/Email Log » Email Failure for main and backup

  • Resolved WP CMS Ninja

    (@billiardgreg)


    So I ran into a strange issue. The cpanel hosting account was set to remote. I had setup main email delivery method of office365 and a fallback method of amazon ses. Everything is running fine. All of a sudden for 2 days it attempted to use the hosting account to authenticate sending out using the credentials for both the main and fallback method. I go in on the third day to figure out what is going on and it is then sending out without issue. I was able to resend the other emails but I am trying to understand what happened.

Viewing 3 replies - 1 through 3 (of 3 total)
  • Thread Starter WP CMS Ninja

    (@billiardgreg)

    So this issue has arisen again. The error log shows the following entry:

    ERROR PostmanWpMail: Exception code=535 message=Incorrect authentication data

    It is almost like Post SMTP occasionally loses the ability to communicate to the remote system. I have fallback method setup on a different SMTP system.

    Thread Starter WP CMS Ninja

    (@billiardgreg)

    Also noticed communication to smtp.office365.com said status was open but the server ID default to the domain for the admin email. Seeing the following message:

    Port 587 can be used for SMTP to smtp.office365.com. Warning: connected to {differentdomain}.com instead of office365.com.

    Thread Starter WP CMS Ninja

    (@billiardgreg)

    Turns out there was a setting in WHM that was forcing SMTP to use local exim. Once this setting which was under Tweak Settings was turned off, the issue disappeared. As to why it was working at all at one point makes no sense.

Viewing 3 replies - 1 through 3 (of 3 total)
  • The topic ‘Email Failure for main and backup’ is closed to new replies.