Re: [courier-users] Courier error message meaning?

[Tim Hunter]

according to the info you posted <[EMAIL PROTECTED]>:     mx2.stlawu.edu [199.0.76.10]: >>> RCPT TO:<[EMAIL PROTECTED]> <<< 450 Client host rejected: cannot find your hostname, [208.31.125.250]   the remote server mx2.stlawu.edu apparently running postfix cannot resolve your hostname from your ip address 208.31.125.250 and it has chosen not to deliver mail from ip addresses that it cannot look up.  Since it returned a temporay error (450) it stays in your mail queue where your mail server attempts to deliver for the default time of 1 week, at which point it gives up and becomes undeliverable.     ---- Original Message ---- From: Michael Weil To: [EMAIL PROTECTED] Sent: Tuesday, June 29, 2004 4:07 PM Subject: [courier-users] Courier error message meaning? > With one potential recipient of mail from a local user, we > consistently get error messages and returned mail. > To the best of my knowledge, the recipient gets all mail from other > sources and we get no > returned mail from other sources. > > > This last email reject took 7 days to become "undeliverable".  Any > ideas? > > > > > > > > >                            UNDELIVERABLE MAIL > > > Your message to the following recipients cannot be delivered: > > > <[EMAIL PROTECTED]>: >     mx2.stlawu.edu [199.0.76.10]: >>>> RCPT TO:<[EMAIL PROTECTED]> > <<< 450 Client host rejected: cannot find your hostname, > [208.31.125.250]