I'm seeing lots of spam email addresses on valid domains but they have several dots/periods for example:
as.qwrdf.zxcv.s.a'@'validmail.com
I would like to just count the number of periods and limit it to one or two and block those. Detecting any pattern and limiting it might also come in handy
Of course this won't resolve the spam issue and the skilled spammers will adapt, but any help with the regex is appreciated.