https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7995

--- Comment #9 from Riccardo Alfieri <riccardo.alfi...@spamteq.com> ---
About this particular rule:

check_sh_emails -- check_hashbl_emails + acl/notag/nodot for gmail stuff

I looked at the code and apparently there is no googlemail.com->gmail.com
normalization.

As you probably know you can use @googlemail.com intead of @gmail.com and have
the email delivered to the same mailbox in both cases. Spammers sometimes use
@googlemail.com addresses to try to evade listings.

On our plugin there is a simple normalization done with this one liner:

$email =~ s/\@googlemail\.com/\@gmail\.com/;

You may want to include that in HashBL.pm before shipping out the pre2

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