Adam Morris writes: > A member is subscribed to two lists I run. > > He can post to one but gets the following error when posting to the > other list.
> SMTP error from remote mail server after end of data: The message should indicate which server rejected it. This error depends on the message content (specifically, a physical line longer than 998 bytes, which he surely sees as a nicely formatted paragraph of normal-length lines). I can't imagine why it depends on the list, it's not hitting the list processing part. As Mark points out, it *could* be Mailman (more precisely, the imported 3rd party library aiosmtpd), but would be at the very mechnical "let's MOVE SOME BYTES!" stage of the process, not dependent on list settings at all. It's definitely a mail server error, not a list-related error. > 550 Maximum line length exceeded (see RFC 5322 2.1.1). It's very unlikely to be a recent (< 4yo) version of aiosmtpd, which issues a different error: "500 Line too long (see RFC5321 4.5.3.1.6)". Apple's Postfix also doesn't issue that message. Nor does Debian's Exim4. The citation to the Message Format RFC 5322 is odd, suggesting Microsoft or other commercial software (you *could* enforce RFC 5322 in a mail server, but no respectable free software does -- that's the MUA's job). If this was your server (and not some intermediate gateway), there should be a log message for it. Do you have access to the MTA logs on your server? So, it's possible but somewhat unlikely that the smtpds at the Mailman host are mishandling the email (doing this *right* *at scale* is hard). But it's also possible that the member's MUA is busted, and is using Content-Transfer-Encoding "8bit" (or worse, "7bit") where it should be using "binary", The difference between binary and 8bit is exactly passing control characters verbatim, and specifically allowing the message composing agent to ignore line-length restrictions. If you have access to the message that got rejected in "source" or "raw" form, you could check those things. Also, some intermediate MTA may be busted and not requesting the 8BITMIME extension to SMTP, which is necessary to get some receivers to relax the line length limitation. Steve ------------------------------------------------------ Mailman-Users mailing list -- mailman-users@python.org To unsubscribe send an email to mailman-users-le...@python.org https://mail.python.org/mailman3/lists/mailman-users.python.org/ Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: https://www.mail-archive.com/mailman-users@python.org/ https://mail.python.org/archives/list/mailman-users@python.org/ Member address: arch...@mail-archive.com
