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On May 29, 2007, at 6:21 AM, Leonard Jacobs wrote:
Thanks for your suggestion to read the FAQ and the associated list postings. I actually found those same postings and tried every suggestion in them that was relevant. Unfortunately nothing worked to resolve this annoying problem. There may be a setting that is
incorrect and there may be something posted that explains this problem and provides a solution but so far I have not located anything that
fixes it for me.It is strange that a pretty vanilla installation, CentOS and Postfix with the latest Mailman version of 2.1.9 is so hard to configure and use. And this after using it on a CentOS 3 box but with frequent
delays in sending and unusal errors. So moving the list was necessary but
made the list totally unusable. I have heard from a few others with similar problems and no solution, so I know I am not the only user with these issues.Any further suggestions would be appreciated.
I don't have any idea what's going on, but here are some mostly
useless comments.
I'm personally still on Postfix 2.3.6, and you mentioned that you're
on Postfix 2.4.1. I wonder if there isn't some new feature, anti-
spam defense, or other setting that is tripping up Mailman. It's
also possible that Postfix 2.4.1 has some bug that's causing it to
reset the connection. I don't have time to slog through the Postfix
change logs, but I suggest you take a look to see if there's anything
relevant.
You might also try the Postfix 2.4.2 release candidate, and/or
grabbing Postfix 2.3.9 to see if that improves things. IME, Postfix
is pretty easy to build and install from source.
If I were debugging this, my next step would probably be to write
some sample Python applications that stress tested SMTP connections
from a Python program. Mailman uses Python's standard smtplib
module, so that's where I'd start. See if you can reproduce the
problem outside of Mailman.
I agree with previous posters that this is almost certainly a problem
with your Postfix installation. Mailman + Postfix has been a long-
term very stable combination, although as I said, it's possible
there's something in Postfix 2.4 that's tripping us up now.
Does anybody else use Postfix 2.4?
- -Barry
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