This is the message in my log, probably for all subscribers to the list -
Error sending email to email@example.com SMTP Error: data not accepted.SMTP server error: DATA END command failed
The message would be fine because it causes the failing email to be requeued, However it is not so fine in this case because when I look in the mail log on my server I can see that each of the failing messages did not actually fail, they were sent - And resent many times …
We have run phpList for about 7 years, the problem only started a few days ago when I installed the new phpList. This was a complete new install, I just migrated the list of subscribers.
Can someone give some insight into this problem
Many Thanks - Chris.