[Exim] what checks for "temporarily unable to verify envelop…

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Auteur: Jeremy C. Reed
Date:  
À: exim-users
Sujet: [Exim] what checks for "temporarily unable to verify envelope sender address"?
From one account, I am unable to email to sourceforge mail accounts.

I receive delayed bounce messages (from the remote server).

When I connect manually and do a mail from, I receive (after about a
minute delay):

451-Envelope sender verification failed
451 rejected: temporarily unable to verify envelope sender address (try
again later) <reed@???>

The sourceforge doc at
http://sourceforge.net/docman/display_doc.php?docid=6747&group_id=1 sort
of indicates that it may be a DNS issue.

Anyways, what checks is Exim doing when it returns this exact message? (Or
was that some custom configuration?)

(The banner says it is some 3.31 derivative. And I did see a patch with
this text, so maybe this isn't even "official" Exim.)

Jeremy C. Reed

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