Re: published mail server behind 2006 cannot telnet out on port 25?

Les Caudle <DotNetWannabe@xxxxxxxxxxxxxxxx> wrote in
news:3lor43deno3vm5f3fpg19c1a3jpb9vvp76@xxxxxxx:

I published an Exchange 2003 mail server behind an ISA 2006 firewall.

From the outside, POP3 works, and SMTP can be used to send an email to
an internal address.

But, the Exchange Server cannot send emails to the outside world, they
just stack up in the queue.

I notice that I cannot telnet to port 25 of an external SMTP server
from the Exchange Server.

I tried adding an outbound SMTP filter from the Exchange computer's ip
to External, but this had no effect.

I don't see anything denied in ISA's monitoring. I see the SMTP
Initiated Connection, and SMTP close connection. Nothing is denied.

I'm running the Exchange box as just a NAT client. Firwall client is
not installed.

What am I missing?

BTW - one other strange anomaly. I can ping www.news.com from the
Exchange box, and the 1st ping will generally go thru, but the next 3
(in the ping request) always fail. I can ping from the ISA box
without problem. --
Thanks in advance, Les Caudle


Is there an access rule for SMTP outbound in the ISA server?

Is there anti-virus running on the Exchange server? make sure that the
mass mailing protection is off, it blocks outbound port 25.
.

Relevant Pages
Loading