Re: [exim] SMTP command timeout on connection - how to troub…

> Set your timeout to 4 minutes instead of two minutes and see what, if
> anything, changes.
>

I changed the timeout to 240 seconds, with no change... it just hangs for
240 seconds after I send the 250 OK, and then I disconnect due to timeout.

Make sure there are no Cisco PIX or ASA devices with "smtp fixup" or
> "inspect smtp" switched on between you and the remote site.


I'm told they do not have a PIX or ASA, but they do have a series 7200
router... it is capable of "smtp fixup", so I am asking them to ask their
router folks if it is enabled.

As another data point... I remembered having this problem with another ISP
a few months back. I just telnet'd to port 25 on their server and guess
what popped up in their initial greeting?:


> ESMTP EdgeWave mag4000


Yep... so here we have two of these "EdgeWave" mail servers that I can't
get mail from (but I can send them mail fine).

Anyone out there interested in looking at the package capture .pcap file I
have?

I will try to look through my logs for "SMTP command timeout" and try to
sift out the obvious spam zombie PCs and look for real mail servers, then
try to see if there is are more EdgeWave issues out there. Maybe it's
something?

- Scott

On Sat, Feb 18, 2012 at 4:51 AM, W B Hacker <wbh@???> wrote:

> Scott Neader wrote:
>
>> I was able to get the remote mail server admin to send me a packet capture
>> in .pcap format (if anyone wants to see it, I'd be glad to share, nothing
>> confidential in the cap).
>>
>> What I see is that our Exim server sends the "250 OK id=xxxxxxx" message
>> just fine, and within a few ms, their server sends an ACK packet.
>>
>> Here's the funny part... 120 seconds later, my Exim server sends a "421
>> my.servername.net: SMTP comamnd timeout - closing connection" packet, and
>> their server sends the ACK for that also, then my server sends the "FIN,
>> ACK", and their server sends the ACK, and the connection is closed.
>>
>> Any ideas what is going on?
>>
>> - Scott
>
>