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On (10/02/06 13:42), Brendan Halpin didst pronounce:
> Is it normal practice for a mail server to
>> 1: silently accept mail for a non-existent local user?
This can happen if there's a catch-all in place -- essientally a mailbox
that catches all mail to a domain that isn't caught by any other
> 2: silently accept mail for a non-existent non-local domain?
To the best of my knowledge, this shouldn't happen. If the domain
doesn't have an MX record, then the mail server doesn't know where to
send the mail and it should be bounced back to the sender.
> 3: not pass back error messages resulting from trying to relay to a
> non-existent domain?
Any fatal errors should be sent back to the sender.
> 4: not pass back other error messages (e.g. SMTP level spam checks,
> or no-such-user at the non-local domain)?
I'm not quite sure what you mean here. If it's a fatal error, then the
sender should be notified. If it's not then the sender isn't notified.
Chat ya later,
BOFH excuse #68: only available on a need to know basis
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