RE: [Exim] No mail receiving from internet.

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Author: John Fletcher
Date:  
To: Phil Pennock
CC: exim-users
Subject: RE: [Exim] No mail receiving from internet.
Sorry, I can explain a bit more.

itsupplies.net is currently hosted on Uk2.net, I have DNS mgmt and have
purely changed over the MX records to point to my server (yes I know, only 1
server for both...its a test!)...

Uk2.net obv. uses sendmail, in fact I think they run RAQ3 servers (pre-built
linux www servers) so they do run s/mail.. that 'itsupplies' ip is prob an
ip for many many virtual domains...

Is it possible then that the SMTP traffic is not actually getting through
somehow?

I thought as long as MX points to me, SMTP should follow that route and not
get caught up!?....

I have no packet filtering on my machine, and DNS purely points to my
router, which points to PIPEX dns....

It must be getting caught somewhere?

John
-----Original Message-----
From: exim-users-admin@??? [mailto:exim-users-admin@exim.org]On
Behalf Of Phil Pennock
Sent: 19 February 2002 02:13
To: John Fletcher
Cc: exim-users@???
Subject: Re: [Exim] No mail receiving from internet.


On 2002-02-18 at 23:06 -0000, John Fletcher wrote:
> I can also send local mails between these 'local' domains. BUT I just

can't
> seem to figure out why I cannot get any mail sent from any other domain to
> these domains. For instance, sending from the TALK21.com web mail

interface
> to john@??? . It just goes to dev/null. I have not rec'd any
> 'bounces' , nor do I get any thing in the EXIM log files to say its been
> rejected, no a sniff in fact in any logs on EXIM....
>
> DNS looks fine for the domains. :


> itsupplies.net. 80243 MX 10 mail.itsupplies.net.
> itsupplies.net. 80243 MX 0 mail.itsupplies.net.


The same hostname at two different MX values isn't "fine", but isn't
causing this problem.

If I try to connect to mail.itsupplies.net on port 25, the packets are
blackholed. Are you sure that you're not packet-filtering TCP/25?

If I try to connect to itsupplies.net on port 25, I get a connection.
This is strange, since mail.itsupplies.net != itsupplies.net, and the MX
records mean mail for itsupplies.net will _always_ go towards
mail.itsupplies.net. So the only reason for an SMTP service to be
publically listening on itsupplies.net is if it's there for some other
domain.

: %; telnet itsupplies.net 25
Trying 212.4.208.121...
Connected to itsupplies.net.
Escape character is '^]'.
220 ultra21.uk2net.com ESMTP Sendmail 0.0.0/0.0.0 ready at Tue, 19 Feb 2002
02:09:09 GMT
QUIT
221 2.0.0 ultra21.uk2net.com closing connection

Sendmail? Sendmail 0.0.0/0.0.0 ? It returns ENHANCEDSTATUSCODES in the
EHLO response, so this isn't Exim dressed up to look like Sendmail in
the connection banner.

Sure you have your DNS and packet-filtering set up correctly?
--
If Windows is the solution, could we please have the problem back?

--

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