Francisco:
Francisco Neira wrote:
Hi all,
Hope you can help me with this.
Not really, but I can feel your pain. I have the same symptoms with
Ubuntu 8.04 and my domain's-relay. Small messages work, big ones
timeout. And if you watch it on iftop you'll see it starting good and
then suddenly stopping and dying.
I did a fresh install of Centos 5 with postfix-2.3.3-2 from RPMs,
Spamassassin, Amavisd-new and Clamav. everything is going very good
until I send messages to mail.osterlingfirm.com
<http://mail.osterlingfirm.com> if the message is tiny, there are no
problems anything bigger than 100k will receive the following:
If you have the time and the hardware, could you build a CentOS 4 server
as a relay for "mail.osterlingfirm.com" and see if the problem
persists? That is, you would relay the messages for that domain from
your server to the new CentOS 4 server and from there to
"mail.osterlingfirm.com". Just to see if it works? This is how I could
make it work for me, it's a dumb solution and I hate it, but it works. I
disabled the window size thingy and the ipv6 (on the Ubuntu) and that
didn't change a thing. I had this problem with Postfix 2.5.1, and didn't
notice any other trouble with the network, only this timeout. I would
not know if other domains work, as I can't deliver mail directly; but
again uploads and transfers work OK (also http proxy). I never tried
with CentOS 5 as it felt too new (worried about having the same problem
as with the shiny Ubuntu), but CentOS 4 works.
I am waiting to find the real solution to this problem, (I'm sure it's a
tweak somewhere, but I don't know where, I tried and searched everything
and gave up by now) and I think not many have this kind of problem. At
least now I know that I'm not as nuts as I thought.
And yes, the CentOS 4 also has an "older" version of Postfix, but I'm
guessing it's maintained.
Please let me know if you find a solution to this situation.
Greetings,
dennis.hitzigrath
