Wietse Venema wrote:
Daniel L. Miller:
Mar 4 23:21:33 mailserver postfix/smtpd[20964]: warning: proxy
inet:192.168.0.10:225 rejected "DATA": "250 2.1.5 Ok"
Your proxy replies with "250 2.1.5 Ok" to the "DATA" command.
250 Is an incorrect reply. It should be "354" for success,
5xx or 4xx for failure.
And because 250 is not a valid DATA reply, Postfix does not go into
the DATA phase.
Postfix then forwards the "250 2.1.5 Ok" to your SMTP client.
When you talk directly to Postfix, this is why you see "250 2.1.5
Ok" in response to DATA. This is clearly bogus, and I'll fix Postfix
so it will send some appropriate reply instead. But I won't be
posting patches for that.
Wow. Last thing I expected was to hear I found a bug in Postfix 2.5.
I'm also pursuing this on the ASSP list - but something else bothers
me. To my (extremely limited) knowledge - ASSP should just be passing
on responses it receives from the servers it is proxying. That first
"250 2.1.5 Ok" is theoretically coming from Postfix, not ASSP - please
see my other email that had a telnet transcript.
Why is it that if I direct telnet to ASSP - which then proxies responses
from Postfix - it works fine? But if I telnet to Postfix first, which
then uses content_filter or smtpd_proxy_filter to connect to the same
ASSP port I telnet'ed to previously - I have this DATA problem? This
feels like I need to adjust something in Postfix for the relay to work
properly.
--
Daniel
