On Sun, Dec 08, 2002 at 10:24:23PM -0500, Mike Burger wrote: > Out of curiosity..I've been rejecting with a code of 550...what's the > difference between 550 and 553?
RFC 2821, s4.2.3:
550 Requested action not taken: mailbox unavailable
(e.g., mailbox not found, no access, or command rejected
for policy reasons)
551 User not local; please try <forward-path>
(See section 3.4)
552 Requested mail action aborted: exceeded storage allocation
553 Requested action not taken: mailbox name not allowed
(e.g., mailbox syntax incorrect)
554 Transaction failed (Or, in the case of a connection-opening
response, "No SMTP service here")
So 550 is the better choice (access denied).
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