On Fri, 15 Jan 2010, Goodman, William wrote:

I see things like below to users I know didn't receive the email. So you
first assessment is correct
"they did receive it but they just can't find it.

Uh no, the message below is a deferral. Postfix keeps retrying until it times out at which point is bounced. How long until it times out is a site configurable length of time (default five days, I think).

to=<u...@somewhere.com>, relay=mail.somewhere.com[212.137.44.179]:25,
delay=8.3, delays=0.02/4.4/0.67/3.3, dsn=4.0.0, status=deferred (host
mail.somewhere.com[212.137.44.179] said: 451 <u...@somewhere.com>...
Requested mail action not taken: mailbox unavailable (in reply to RCPT
TO command)) Jan 13 15:25:00 my-mailserver postfix/smtp[28262]:
B405E2D858F

-- Larry Stone
   lston...@stonejongleux.com
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