Lindsay Haisley writes:
Sam, et al,Here's a situation that happened recently. I posted to a popular mailing list and courieresmtp logged the following.Aug 19 20:12:06 shakti courieresmtp: id=000000000027586D.0000000050318EDD. 00006F31,from=<fmouse-mail...@fmp.com>,addr=<mailman-us...@python.org>: 450-4.3.2 Service currently unavailable Aug 19 20:12:06 shakti courieresmtp: id=000000000027586D.0000000050318EDD. 00006F31,from=<fmouse-mail...@fmp.com>,addr=<mailman-us...@python.org>: 450 4.3.2 Contact your postmaster/admin for assistance. Please provide the following information in your problem report: time (A... Aug 19 20:12:06 shakti courieresmtp: id=000000000027586D.0000000050318EDD. 00006F31,from=<fmouse-mail...@fmp.com>,addr=<mailman- us...@python.org>,status: deferredThe connecting server at python.org returned a temporary error. Apparently Courier queued this email for redelivery, and the MUA (Evolution) noted the failure and apparently left the problem email in my Outbox.
Not possible. If Courier already has this message, the MUA must've sent it, and, as far as the MUA is concerned, the message has been sent to the mail server.
A MUA has absolutely no means, whatsoever, to know anything about the message after it sent it to the mail server. Once Courier receives a message, it acknowledges it with a 2xx. It does not wait and try to forward the message, before acknowledging it.
A minute later, the MUA tried again, successfully:Aug 19 20:13:10 shakti courieresmtp: id=00000000002758BD. 0000000050318F21.00006FAC,from=<fmouse-mail...@fmp.com>,addr=<mailman- us...@python.org>: 250 2.0.0 Ok: queued as 3X0cTL2xBFzQM6 Aug 19 20:13:10 shakti courieresmtp: id=00000000002758BD. 0000000050318F21.00006FAC,from=<fmouse-mail...@fmp.com>,addr=<mailman- us...@python.org>,size=4147,success: delivered: mail.python.org [82.94.164.166] Aug 19 20:13:10 shakti courieresmtp: id=00000000002758BD. 0000000050318F21.00006FAC,from=<fmouse-mail...@fmp.com>,addr=<mailman- us...@python.org>,size=4147,status: success
This is Courier sending a different message. This is not your MUA.
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