ASA regex to filter smtp traffic

Unanswered Question
Apr 9th, 2010
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I'd like to put a rule in place on our ASA that will drop any incoming SMTP traffic that has a FROM address matching our domain. For example, drop any inbound SMTP traffic that has a from address of [email protected]. However, I'm really unsure how to do this. Are there any articles or an overview that someone can point me to?

I'm interested in doing this as I believe it will help drop spoofed email traffic at the edge, before it even hits our antispam device.



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