I just ran into this, and I'm curious. Can anyone think of any rational
reason why a site would return a user code 450 for "user unknown"? I had
a subscriber backing up in the queue, and when I went and looked, they
were being bounced as user unknown, but with a 450 code, deferring
delivery instead of rejecting it.
huh? (fwiw, the SMTP server is Interscan, whatever that is. And there
are other subscribers successfully receiving mail on the domain, so it's
not some obscure misplaced spamblock, at least as far as I can tell)
Chuq Von Rospach, Internet Gnome <http://www.chuqui.com>
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