Email rejection #smtp510
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I have a subscriber this morning reporting that he cannot reply to sender. That is to say that when he replies he gets an smtp 510 error report sent back.
I will continue to scan for old instances in the archives but just in case this is a newly arisen overnight error ...
This is an AOL customer trying to reply directly to a 'munged' address and getting back:
Sent: Fri, 19 Feb 2021 11:23
Subject: Failure Notice
Sorry, we were unable to deliver your message to the following address.
510: The group 'bbbbbb=btinternet.com' does not exist. You are subscribed to the following groups: KFHSfirstname.lastname@example.org.
My observations on this:
Malcolm Austen <malcolm.austen@...>