Milter-greylist

> 
> - /@gmail\.com$/ means "any address ending with "@...". In 
> milter-greylist this would never match, since all envelope 
> FROMs always 
> end with ">".
> 

Do the spammers know that they must comply to the standard?
I already seen e-mail addresses in the envelop without opening "<" and closing ">".
Unfortunately the sendmail happily accepts it.
Since that time I always use like:
/@gmail\.com[ 	>]*$/
(Please note, there are a tab and a space in addition to the ">" in the brackets.)

Bests,
Attila