On 6/17/2011 12:55, Ben Parker wrote:
> That is the normal message that LISTSERV sends after an auto-delete. It is
> normally always sent to the deleted address precisely because, as the message
> says: "It is never normal for a mail system to claim  that a valid, working
> account does not exist,...".  If the message, as in this case does get
> through, then there IS some kind of problem with the recipient's mail system
Since there are multiple MX mail hosts, each may be needed to be inspected.

> that needs to be looked into.  For example, perhaps their mail server is
> blocking 'bulk' mail from your LISTSERV server for some reason, but accepting
> individual emails.  There is nothing you can do about this except call it to
> recipient's attention.

and also contact postmaster@bouncing_host

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