PIX 520 V6.3.3

I am using a PIX 520 v 6.3.3 and having a spam problem. A spam service Postini is employed. I want to deny all SMTP traffic unless it comes from one of the Postini servers. Can the PIX be configured to accomplish this?

Thanks in advance for any help.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Sure. Assuming that you have an access-list entry similar to this:

access-list outside_access_in permit tcp any host A.B.C.D eq smtp

Change to:
 access-list outside_access_in permit tcp host host A.B.C.D eq smtp
Where: = Postini mail host IP address

Any time you make changes to a PIX access-list, you should re-apply that acl to the interface...

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Software Firewalls

From novice to tech pro — start learning today.