zonealarm bots port 25

I read an article in the Guardian today about bots and fire walls. It said
that if you have a router with a firewall you can block outgoing traffic on
port 25 to see if anything keeps trying to go out (spams). I have a Bt
Voyager router and no idea about anything that it has or has not capablity
to do. However, I do have Zonealarm free edition and wondered if I can do
this blocking the port 25 business on that firewall. If I can do it, well,
how?

 

Zone Alarm IIRC will tell you when an application attempts to access
the Internet, if you put it in a certain mode (I can't recall what
they call it, but basically whenever an app attempts to access the
Internet, it asks you to allow or block it).

Unless you have a reason to block port 25 (and likely you don't),
don't.

 

Check the options in your e-mail client, I'm sure you are likely to find
an option to "Warn me when other applications try to send mail as me"

 

Never seen that in any e-mail client I've used.

 

It's an option in Outhouse Distress.

 

Would you think Outhouse Distress (especially if it is not open) would
be able to detect a trojan surreptitiously sending email in the
background?

 

Outhouse detecting a torjan?

Talk about the pot calling the kettle black..

 

That always struck me as a rather useless function anyway, since many
trojans have their own SMTP engine.

 

Exactly. All modern ones do. The days of a trojan or other malware using
the owner's email client were over quite some time ago.