RegEx question... use of period

Hello procmail gurus,

I am trying to create a recipie that would accept mail addressed to any
somethingDOTsomething(_at_)domain(_dot_)com (i.e., firstname.lastname) address 
and
forward it all to one place.  My problem is with the regular expression
format of the first.last part - since putting "." and "*" together works as
a wildcard.

Any help on syntax would be appreciated.

Andy
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