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Smart Hosts not sendng through ISA 2004 - 6.Sep.2007 5:37:12 AM

petestevens

Posts: 7
Joined: 13.Nov.2006
Status: offline

Hi, my client has exchange 2003 behind isa 2004 working quite happily sending email via normal DNS. They have a problem sending to one email domain and their ISP has asked them to use Smart Hosts and send to them rather than DNS direct.

I reconfigured the exchange server to use Smart Hosts and all out bound mail stopped!!

Tried the normal - Telnet to the smart host on port 25 no problems. Setup Outlook Express on the Exchange server and this will not send either - this message from OE

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Subject 'fgneriogb', Account: xxxxxx, Server: 'smtp-out.mail.griffin.com', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 10053, Error Number: 0x800CCC0F

Get this message from ISA 2004

Closed Connection

ISA01 06/09/2007 10:05:26

Log type: Firewall service

Status: A connection was abortively closed after one of the peers sent a RST segment.

Rule: SMTP from EX01

Source: Internal ( 192.168.1.5:5165)

Destination: External (smtp-out.mail.griffin.com 85.189.39.6:25)

Protocol: SMTP

User:

Additional information
1.                  Number of bytes sent: 36505 Number of bytes received: 578
2.      Processing time: 88000ms Original Client IP: 192.168.1.5
3.                  Client agent:

Any ideas????

Cheers

Pete

Post #: 1

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RE: Smart Hosts not sendng through ISA 2004 - 6.Sep.2007 11:03:14 AM

Rotorblade

Posts: 1002
Joined: 27.Feb.2007
Status: offline

Hi Pete,

quote:

Tried the normal - Telnet to the smart host on port 25 no problems. Setup Outlook Express on the Exchange server and this will not send either - this message from OE

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Subject 'fgneriogb', Account: xxxxxx, Server: 'smtp-out.mail.griffin.com', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 10053, Error Number: 0x800CCC0F

Installing OE on an Exchange server is not going to work! You will receive a Socket error because the port(s) is in use by Exchange.

From the log info it looks like the problem is on the receiving server or something with how you configured the smart host with the packets being dropped by the server. If you have an SMTP (outbound) access rule and you can telnet through, ISA is probably not issue.

Was the smart host created at the SMTP virtual server or by using a routing connector? If you only want to route Domain specific SMTP traffic, then creating a routing connector would be your best option for that specific domain.

HTH

RB

(in reply to petestevens)

Post #: 2

RE: Smart Hosts not sendng through ISA 2004 - 9.Sep.2007 1:20:32 PM

tshinder

Posts: 47659
Joined: 10.Jan.2001
From: Texas
Status: offline

What did you use for a Smart Host?

Tom

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Prowess Consulting http://www.prowessconsulting.com/
Blog: http://blogs.isaserver.org/shinder/

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(in reply to Rotorblade)

Post #: 3