Delay in receiving mails

[andygrootens]

Hey there,

I've installed and deployed the Proxmox Mail Gateway, and I see that it is working. I receive no spam, which of course is good, but there is (on some of the mail we receive) a big delay between the sending time and the time we receive the mail.

As an example: the confimation mail from the proxmox forum was sent 12:42 and was received by me on 13:39. On the other hand, the welcome message was sent right away and instantly received.

My configuration (using MS Exchange):
System: IP of proxmox: 192.168.3.253
Default Relay: 192.168.3.1 (Exchange server) SMTP port 25
External SMTP Port 26
Internal SMTP Port 25

On the router I have changed port 25:
ip nat inside source static tcp 192.168.3.253 26 interface xxx.xxx.xxx.xxx 25 extendable

Is this a good config, or did I make a mistake somewhere?

Kind regards,
Andy Grootens

 

[tom]

take a look in the message tracking center to see why the email is deferred - I assume its just greylisted.

 

[andygrootens]

Hi Tom,

Thanks for your fast reply.

What I see from that particular message is that it is accepted/delivered, and processed in little more then one second. It seems that the delay is between the moment it is send, and when it is received by the proxmox server. But for "the outside" nothing has changed, right? What do you think of the port configuration?

When I do a telnet on port 25 of our external ip (from remote location) I get an connect error 10060.

Here's whats in the Tracking Centre:

Jul 26 15:37:56<>andy.grootens@ourdomain.nl accepted/deliveredJul 26 15:37:55smtpdconnect from fallbackmx.ispdomain.nl[213.197.30.xx]Jul 26 15:37:55smtpd635289C7A5: client=fallbackmx.ispdomain.nl[213.197.30.xx]Jul 26 15:37:55smtpddisconnect from fallbackmx.ispdomain.nl[213.197.30.xx]Jul 26 15:37:55proxprox9C7A64C4D8FB37938A: new mail
message-id=<20100726104219.c7d8b02352b5@forum.proxmox.com>Jul 26 15:37:55cleanup635289C7A5: message-id=<20100726104219.c7d8b02352b5@forum.proxmox.com>Jul 26 15:37:56proxprox9C7A64C4D8FB37938A: SA score=0/5 time=0.889 bayes=undefined autolearn=ham hits=Jul 26 15:37:56proxprox9C7A64C4D8FB37938A: accept mail to <andy.grootens@ourdomain.nl> (876A09C7A3)Jul 26 15:37:56proxprox9C7A64C4D8FB37938A: processing time: 1.106 secondsJul 26 15:37:56lmtp635289C7A5: to=<andy.grootens@ourdomain.nl>, relay=127.0.0.1[127.0.0.1]:10024,
delay=1.3, delays=0.12/0.01/0.07/1.1, dsn=2.5.0, status=sent (250 2.5.0 OK
(9C7A64C4D8FB37938A))Jul 26 15:37:56smtpdconnect from localhost[127.0.0.1]Jul 26 15:37:56smtpd876A09C7A3: client=fallbackmx.ispdomain.nl[213.197.30.XX]Jul 26 15:37:56smtpddisconnect from localhost[127.0.0.1]Jul 26 15:37:56cleanup876A09C7A3: message-id=<20100726104219.c7d8b02352b5@forum.proxmox.com>Jul 26 15:37:56smtp876A09C7A3: to=<andy.grootens@ourdomain.nl>, relay=192.168.3.1[192.168.3.1]:25,
delay=0.18, delays=0.05/0/0.01/0.13, dsn=2.6.0, status=sent (250 2.6.0
<20100726104219.c7d8b02352b5@forum.proxmox.com> Queued mail for delivery)

 

[tom]

the log looks good, no delay. so what´t the issue now?

for firewall and port configuration, take a look into the documentation and yes, testing with telnet is the right approach.