This past weekend, I noticed these in the error log...
Just wanted to post these two entries here to be helpful, in case it had to be looked into!
ErrorException: Bounce message processing failed: [E_WARNING] preg_replace(): Unknown modifier 'r'
I'm using Amazon SES SMPT for mail.
I got a report from Amazon of a bounced post notification:
Final-Recipient: rfc822; firstname.lastname@example.org
Diagnostic-Code: smtp; 550 5.1.1 <email@example.com>: Recipient address rejected: User unknown
So I presume that is an invalid...