sendmail spam domain filtering

[NumNut]

Hello,

I have an e-mail address (bub@mydomain.com) that is now being targetted with spam. The spamming i.p. numbers and apparent 'From' domains are always different.

Since I only want to receive mail from an educational server (*.abc.ac.uk), can I somehow reject all mail destined for my e-mail address that is NOT from *.abc.ac.uk ?

The trusted sender's e-mail address will always be 'something@*.abc.ac.uk'.

The asterisk in *.abc.ac.uk may be any word (e.g. something@biology.abc.ac.uk, something@admin.abc.ac.uk etc.) or it may be absent (something@abc.ac.uk), but the 'root' of the trusted sender's e-mail address will always be 'abc.ac.uk'.

Can I block all e-mail destined for bub@mydomain.com that does not have 'something@*.abc.ac.uk' as the sender's e-mail address or '*.abc.ac.uk' as the sender's domain ?

I am running sendmail-8.12.11-4.6 and am a novice when it comes to sendmail configuration/tinkering.

Any assistance will be appreciated. Thanks.

[eiden]

You can do this in AdminCP->Mail Parser->Insert Rule