Author: Dominic Benson Date: To: exim-users Subject: Re: [exim] state.gov users cannot send to my exim mail server
On 22/03/11 16:56, Karl Fischer wrote: > Am 22.03.2011 17:42, schrieb Kebba Foon:
>> my MX is mail.qanet.gm or newgainde.qanet.gm
> Kebba,
>
> there seems to be something blocking port 25 traffic to your server.
> I can't reach any of them neither.
I can get a response from mail.qanet.gm
telnet mail.qanet.gm 25
Trying 196.46.232.3...
Connected to mail.qanet.gm.
Escape character is '^]'.
220 *****************************************************************
^]
telnet> quit
but not from newgainde.qanet.gm, which just times out.
I also get an interesting result from pinging it:
PING newgainde.qanet.gm (196.46.232.17) 56(84) bytes of data.
64 bytes from newgainde.qanet.gm (196.46.232.17): icmp_seq=1 ttl=50
time=151 ms
64 bytes from sawalo.qanet.gm (196.46.232.17): icmp_seq=2 ttl=50 time=157 ms
64 bytes from newgainde.qanet.gm (196.46.232.17): icmp_seq=3 ttl=50
time=153 ms
64 bytes from sawalo.qanet.gm (196.46.232.17): icmp_seq=4 ttl=50 time=154 ms
The alternating hostnames don't feel like a happy start...
What I am interested in is what is in front of mail.qanet.gm - it looks
to me like a fair candidate for a SMTP-proxying security appliance.
Problems have certainly been known to be introduced by things like this,
so that would be my first guess. If they're both behind such a device,
it may be that it has some internal concurrent connection limit that
causes additional attempts to time out.
Can you avoid or relax the validation/interference on the proxy
(assuming it exists!)?
