Admin email

[Max Kipness]

Hello -

My company hosts quite a few domains, and last Friday we started getting
emails admin at ourdomains.com with an attachment: message.zip. The
attached seems to make it through Fprot and Sophos ok, and I haven't
even bother to open it and see what it is. My question is whether I
could add a rule in spam.blacklist.rules like:

admin@*

Will this work without issue?

Thanks,
Max