Hello,
I have a few email addresses that are spamtrap. typically, these are real email addresses that have been used in the past, have been leaked to some spam list or another and have been decommissioned (in my environment, the half-life of an active email address can be pretty short on some domains).
I would like to promote several of these address as spam traps: every server that tries to send a mail to one of these must be considered hostile.
My mail server has already an option to do that but, unfortunately, it does not work in practice because all the mail are forwarded by our UTM: the best I would achieve by activating that functionality at the mail server level would be to blacklist my gateways. Not good [:)]
So, I'm wondering what is the best way to implement that in UTM. Is it even possible ? I couldn't find any option for even rejecting mail based on a static recipient blacklist except with writing an expression filter.
Any suggestion ?
Thanks
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