Problem with exim + mailscanner

[Jim Holland]

On Tue, 19 Sep 2006, Javier Martinez wrote:

> It looks ok:
> 
> telnet> quit
> Connection closed.
> fisica:/home/estud/complejos/ymmiztli/mail# telnet 200.17.209.129 25
> Trying 200.17.209.129...
> Connected to 200.17.209.129.
> Escape character is '^]'.
> 220 fisica.ufpr.br ESMTP Postfix (Debian/GNU)
> ehlo fisica.unam.mx
> 250-fisica.ufpr.br
> 250-PIPELINING
> 250-SIZE
> 250-ETRN
> 250 8BITMIME
> mail from: <root at fisica.unam.mx>
> 250 Ok
> rcpt to: <luz at fisica.ufpr.br>
> 250 Ok
> data
> testing 354 End data with <CR><LF>.<CR><LF>
> 
> How can I test if they are verifing the sender??

By a rather long delay between the "mail from:" command and the "250 OK".
However that doesn't seem to be the problem, as your mail seems to have
been accepted now.  Did you carry out a final test by entering some data
after the data command and then entering the final "."?

Sometimes the network problem only becomes apparent if a large message is 
sent, so a small test like the above will look OK, but a test with a real, 
larger message will still fail.  If that is the case then you have to 
start analysing network problems such as MTU, PMTUD, firewall issues etc.

Sorry - I don't think I can assist further at this point.  I would try 
taking the issue up with their network administrator.

Regards

Jim Holland
System Administrator
MANGO - Zimbabwe's non-profit e-mail service

> On Wed, Sep 20, 2006 at 12:23:13AM +0200, Jim Holland wrote:
> > On Tue, 19 Sep 2006, Javier Martinez wrote:
> > 
> > > Actually I pinged the site, and times are ok:
> > > 
> > > PING 200.17.209.129 (200.17.209.129) 56(84) bytes of data.
> > > 64 bytes from 200.17.209.129: icmp_seq=1 ttl=50 time=309 ms
> > > 64 bytes from 200.17.209.129: icmp_seq=2 ttl=50 time=244 ms
> > > 64 bytes from 200.17.209.129: icmp_seq=3 ttl=50 time=224 ms
> > > 
> > > 
> > > All sites wich I'm having the problem stops in MAIL FROM, is there any
> > > way to try to wait for more time the answer? I did it manually and I
> > > could sent email.
> > > 
> > > J.
> > 
> > I have tried connecting to the server from here and don't see any problem.
> > 
> > Have you tried manually telneting yourself?  eg:
> > 
> > # telnet 200.17.209.129 25
> > Trying 200.17.209.129...
> > Connected to 200.17.209.129.
> > Escape character is '^]'.
> > 220 fisica.ufpr.br ESMTP Postfix (Debian/GNU)
> > ehlo pegaso.fisica.unam.mx
> > 250-fisica.ufpr.br
> > 250-PIPELINING
> > 250-SIZE
> > 250-ETRN
> > 250 8BITMIME
> > mail from:<listas at pegaso.fisica.unam.mx>
> > 250 Ok
> > rcpt to:<someuser at fisica.ufpr.br>
> > 
> > If the delay is after the "mail from:" part then is it possible that they 
> > are doing sender verification and can't connect back to your server to 
> > verify the sender?
> > 
> > Regards
> > 
> > Jim Holland
> > System Administrator
> > MANGO - Zimbabwe's non-profit e-mail service
> > 
> > 
> > > On Tue, Sep 19, 2006 at 09:30:18PM +0200, Jim Holland wrote:
> > > > On Tue, 19 Sep 2006, Javier Martinez wrote:
> > > > 
> > > > > I have a problem sending email. 
> > > > > 
> > > > > I'm getting some of this:
> > > > > 
> > > > >   Delay reason: Connection timed out:
> > > > >     SMTP timeout while connected to fisica.ufpr.br [200.17.209.129] after MAIL
> > > > > FROM:<here at fisica.unam.mx> SIZE=4194
> > > > >   to at fisica.ufpr.br
> > > > >     Delay reason: Connection timed out:
> > > > >     SMTP timeout while connected to fisica.ufpr.br [200.17.209.129] after MAIL
> > > > > FROM:<here at fisica.unam.mx> SIZE=4194
> > > > > 
> > > > > and my logs:
> > > > > 
> > > > > 1GNurc-00047n-1J == to at fisica.ufpr.br R=dnslookup T=remote_smtp defer
> > > > > (110): Connection timed out: SMTP timeout while connected to
> > > > > fisica.ufpr.br [200.17.209.129] after MAIL FROM:<here at fisica.unam.mx>
> > > > > SIZE=3008
> > > > > 
> > > > > I googled and I couldn't find a solution to my problem, I'm having this
> > > > > problem with a couple of hosts but my connection is working ok.
> > > > 
> > > > Your connection may be fine, but theirs isn't.  Do some basic network 
> > > > tests - try pinging and tracerouting to their server.
> > > > 
> > > > Try forcing the mail manually, and keep killing the process if it looks as
> > > > if it is going nowhere rather than leave it to time out on its own.  
> > > > 
> > > > Often there isn't much that you can do in such situations unless you can
> > > > get hold of someone at the other end to analyse the network problem
> > > > between the servers involved in more detail.  I sometimes find that I can
> > > > spool such mail on another server that has different routing and enable
> > > > delivery that way.  I have exactly this problem with the very service
> > > > provider mentioned in my earlier posting about Zimbabwe being disconnected
> > > > - TelOne - to whom delivery is sometimes impossible.
> > > > 
> > > > Regards
> > > > 
> > > > Jim Holland
> > > > System Administrator
> > > > MANGO - Zimbabwe's non-profit e-mail service
> > > > 
> > > > -- 
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> > > > 
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> > > > 
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> > > 
> > 
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> > 
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> > 
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