Hm,

MRU size?

Best Regards
Andy Schmidt

Phone:  +1 201 934-3414 x20 (Business)
Fax:    +1 201 934-9206 



-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rifat Levis
Sent: Tuesday, July 22, 2003 06:39 PM
To: [EMAIL PROTECTED]
Subject: [Declude.JunkMail] Re:Email with attachments kills the connection


This looks like a familiar problem ,

Here is some cases in which this can occur.

1) Even the T-1 connection seems OK ,you should check it again , sometimes
modems get connected but because of the poor quality there can be some data
corruption at high data transmission . Check a continous ping to the router
address , send at least 100 ping packets to see if there are some packet
loss.And also make a download from a ftp from a near location to check the
speed.

2) Second possibility ,
There is a misconfiguration in your firewall .
As i dont have enough information about the firewall ,check if the firewall
intercept the smtp protocol. Or if there is a bandwith limitation .

If you can provide more information about the system , i can help more

Regards
Rifat Levis






----- Original Message ----- 
From: i360
To: [EMAIL PROTECTED]
Sent: Tuesday, July 22, 2003 11:58 PM
Subject: [Declude.JunkMail] Email with attachments kills the connection


I have an interesting problem.

One of my clients does have a T-1 with AT&T.

When they send emails with no attachments it works fine, no problem at all
but when they attach an a file and it does not have to be more than a few
K's they get a timeout when sending emails.

If they send from any connection outside that T-1 everything works fine and
if they send from any of the other T-1's they have with AT-T it works fine
too.

ATT is pointing the finger at us of course.  The latest thing is that we
don't have their reverse DNS set up right but the we don't check for it and
if that was the case all the email should be rejected.

We even replace their firewall just to satisfy ATT with no luck.

Does anyone have any suggestions, I am at a loss.

Thanks,

Heimir

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