Question : Need to lock down SMTP traffic - Urgent!

Hi Experts, sorry to spring an urgent request on you. We've had an Admin guy make changes to our ASA firewall & we are accepting SMTP traffic from anywhere rather than Messagelabs (our mail scanners).

ML's have suspended outbound mail until I lock down SMTP traffic so, I need to configure my ASA to allow SMTP traffic in from the following IP range only:  /20 -  /20 -  /21 -  /21 -  /21 -  /23 -  /23 -  /23 -

Could you let me know the syntax please?

Many thanks in advance.

Answer : Need to lock down SMTP traffic - Urgent!


show ip access-list and see the current running enties , may be the entry for line  12 is not matching.
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