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isa firewall  - apple computer - pop3 inbound does not work

Posted on 2009-04-03
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Last Modified: 2012-05-06
I have set up a an ISA 2006 server as a firewall / perimeter firewall and moved everything behind it and all the clients work except on 1 apple computer.  It cant send pop email but can receive pop email.  The ISA server is configured so all internal traffic is totally open to communicate outbound.

has anyone any ideas what me stop thins apple computer from receiving pop3 email.  I have done all the usual things, made sure their email servers are up, dns is and gateways are correctly configured.  It must be the firewall because it was working an hour earlier before them move to the ISA firewall.
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Question by:martinmcginley
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Alan3285 earned 500 total points
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Hi,

Just to clarify, your problem is that it can't SEND email?

I seek clarification because you say in your second paragraph:

"has anyone any ideas what me stop thins apple computer from receiving pop3 email"

On the assumption that it is outgoing mail that is the issue, can you connect to the outgoing mail server from the Apple machine at all?

To test, use telnet (or whatever is on the Apple machine) to connect directly to the outgoing mail server.  Something like:

telnet smtp.gmail.com 25

or

telnet smtp.gmail.com 465

depending on whether the outgoing mail server is using secure or unsecured connections (replace gmail with whatever the outgoing server's details are).

If you can connect like that, then there is no firewall issue.

If that fails, try connecting directly by IP:

telnet 209.85.147.109 25
OR
telnet 209.85.147.109 465

Those are gmails smtp server IPs as of right now from here, but again replace those IPs with those of your outgoing mail server.

If that works, when the previous one didn't, then you have a DNS problem.

Try those then post back with the results.

Alan.
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