[isalist] Re: SMTP Connection Closed

  • From: "Amy Babinchak" <amy@xxxxxxxxxxxxxxxxxxxxxxxxxx>
  • To: <isalist@xxxxxxxxxxxxx>
  • Date: Thu, 18 Jan 2007 19:01:38 -0500

So assuming that this used to work you've eliminated the other obvious things 
besides filtering like bad DNS, flakey ISP, blacklisting, grey listing, etc?

________________________________

From: isalist-bounce@xxxxxxxxxxxxx on behalf of ISA
Sent: Thu 1/18/2007 6:46 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] SMTP Connection Closed


Good questions!
Thor: I was referring to Exchange filtering NOT ISA. I was not aware of the 
NOOP config in the SMTP filter properties.
Amy: By client I mean another account with a separate ISP and Exchange server 
somewhere else in the world. i.e. NJ.
 
Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 08873
732-213-0600
www.networkblade.com <http://www.networkblade.com/> 
 
 
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%20Connection%20Closed.EML/1_multipart/image001.jpg>
  
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%20Connection%20Closed.EML/1_multipart/image002.jpg>
  
________________________________

From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On 
Behalf Of Thor (Hammer of God)
Posted At: Thursday, January 18, 2007 6:40 PM
Posted To: ISA
Conversation: [isalist] SMTP Connection Closed
Subject: [isalist] Re: SMTP Connection Closed
  
Just to make sure we're saying the same thing.. Not filtering via Exchange and 
3rd party- the ISA SMTP filter.  You disabled that?

t


On 1/18/07 3:30 PM, "ISA" <ISA@xxxxxxxxxxxxxxxx> spoketh to all:
Thor - thanks but I've turned off ALL filtering via Exchange and 3rd party 
software.
 
I've tried connecting (via telnet) from multiple locations (ISP) and from 
Exchange 2003 and SBS 2003. Some work and Some don't. When watching the ISA 
real-time logs, the connection is initiated then 5 seconds later it is then 
closed by the Exchange publishing rule.
 
A 12-pack for the one who gets this one!
 
<and this is on my own server/network>
 

Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 08873
732-213-0600
www.networkblade.com <http://www.networkblade.com/> 
<http://www.networkblade.com/>  
 
 
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%20Connection%20Closed.EML/1_multipart/image003.jpg>
  
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%20Connection%20Closed.EML/1_multipart/image004.jpg>
 
________________________________

From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] 
<mailto:isalist-bounce@xxxxxxxxxxxxx%5d>  On Behalf Of Thor (Hammer of God)
Posted At: Thursday, January 18, 2007 6:22 PM
Posted To: ISA
Conversation: [isalist] SMTP Connection Closed
Subject: [isalist] Re: SMTP Connection Closed
  
Check your SMTP filter settings for command lengths... NOOP has been 
problematic before at its default of 6 - I changed mine to 20 after sniffing 
traffic and determining some older Exchange boxes were padding NOOP with 
spaces..

t


On 1/18/07 1:46 PM, "ISA" <ISA@xxxxxxxxxxxxxxxx> spoketh to all:
Hope someone can help!
 
I think this is an ISA 2004 (patched) issue.
 
From some clients I can send/receive email just fine (and telnet port 25). But 
from other clients I can not. I monitored the ISA logs and observed the 
connection initiated then being closed.
 
From Exchange 2003 box I shut of IMF and GFI services - still not luck 
receiving email or telnet'ing from a particular client.
 
Any ideas would be greatly appreciated.
 
Respectfully
 

Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 0887
732-213-0600

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