On Wed, 17 Sep 2003 18:28:50 EDT, Dean Anderson <dean@av8.com> said: > Your mail client was making a false assumption. That is a bug in the > software. The mail client shouldn't be looking up domains. It should be > sending it to the relay. The relay then decides where to send the message. OK. Now repeat your entire thing, this time from the point of view of the MTA that's just been handed a piece of mail by the MSA. Hey.. the MTA *should* be looking up domains, and deciding where to route them. And most MTAs really appreciate it if the DNS gives them *useful* information like an NXDOMAIN return if it doesn't exist, so it can bounce the mail *RIGHT NOW* rather than having it sit in a queue for hours or days waiting for Verisign's Snubby BMTP (Broken Mail Transport Program) to become available so it can do something silly like harvest the From: line and then reject the mail. For bonus points, work out what happens to your mail if you happen to get more than one RCPT TO (possibly by sending to 2 or 4 people at the same now-defunct site). Wow, that 221 shows up at an inconvenient time, doesn't it?
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