S
scott_auge
Guest
Ya can't. The MTA is to far up the TCP stack to realize if it is a router, the receiving MTA is turned off, a wire is unplugged, DNS is screwed up, etc. It can just tell if it connected to the receiving MTA, if that mailbox is there, and if the mail box is full or the message is to long (it really depends on the receiving MTA though who might not say anything). That goes into the email back as postmaster.
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