Hi community,
I had a request recently. How can we warn end user recipient when receiving mail with MAIL-FROM (envelope sender) is different from the From header. (I am not talking about Spoofing the internal domain)
I was thinking of adding a content filter or message filter: if $envelopefrom != header("from"), but found comparison is not possible with ESA.
This was confirmed with this feature enhancement CSCvb97836 / CSCzv12332 .
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCzv12332
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvb97836
Thant said, I was thinking of an alternative to check whether the sender email and the header are different or not
Any idea?
Thank you
