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Can't send mail - Exchange/ISA

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6 replies

by quintar51

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Hi all,

I have an ISA box and an Exchange 2000 sp3 box.

I am unable to send any email. I always get the delay error.

DNS is working fine. On the Exchange box, I am able to resolve external sites, ie. www.msn.com, www.google.ca, etc.

I am able to receive email, but can't send any.

I created protocol rules in ISA to allow SMTP outbound access and created a rule for DNS outbound access.

Am I missing anything else?

6 replies

by cg it

Doesn't sound like you missed anything. Question(S) did you publish the Exchange server in ISA server using the wizard and did you run the ISA server secure server wizard? if so, how was that setup.

only other thing I can think of is trying the telnet test to see if port 25 is functioning on exchange and port 25 if open to outbound traffic on any routers between the internet and ISA server.

by quintar51

Hi DR,

I did publish the server in Exchange, using the Secure Method, but it didn't work.

I did find an article from MS, forget the number, but it also said how to publish it 'manually'. I tried that as well. I'm sure my port 25 is working because I can receive mail. I also used an external site which has SMTP test utility, and it connected using port 25. I tried reinstalling ISA, but to no avail.

by cg it

Quintar open up the ISA managment console, expand access policy, expand IP packet filters. you should have SMTP 25 OUT filter in Allow mode, on defaul external IP address [or if your using 2 NICs the one you've specifed as external] remote computers = any direction = outbound local port = all remote port = 25. Second filter is for inbound in allow mode default external IP address remote computers = any direction = inbound local port = 25 remote port = all ports.

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