cristian.mitrana at online.ie
Sun Mar 6 02:25:58 EST 2005
Tanya N kessler wrote:
>I know this isn't directly related to Cyrus IMAP, but
>I thought maybe you could help. I recently setup
>Cyrus IMAP with Sendmail using sieve on an FC3 box. I
>can successfully send mail to certain domains while at
>the same time fail to send mail to other domains.
>I've been digging through the web and found something
>about PMTU problems with ADSL. I am using ADSL. It
>seems that my connection just times out. Here is my
>Mar 5 11:21:47 server sendmail: j23H8TtI004864:
>to=<fooman at hotmail.com>, delay=1+23:13:14,
>xdelay=00:00:00, mailer=esmtp, pri=4351863,
>relay=mx4.hotmail.com., dsn=4.0.0, stat=Deferred:
>Connection timed out with mx4.hotmail.com.
Hotmail is very slow to respond on smtp, you might
try to increase the connect timeout. I had to to that
but I'm using postfix so the setup is different.
For PMTU problems I use on the linux router an iptables rule like this:
iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -o $INETIF --match
tcpmss --mss 1400:1536 -j TCPMSS --clamp-mss-to-pmtu
In my case some web sites were timing out when connecting with the browser
(opera.com for instance).
>I get this message for a couple of domains. The whole
>thing is kind of funny, because not even a week ago I
>could send out mail to any domain with no problems.
>Can anyone shed some light on this problem???
If you had the same ADSL connection back then I would
guess that you want to change the smtp timeout for sendmail
since it is not PMTU related.
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