I have a mailing list script I wrote and some idiot tried to screw things up by adding their name as xung03@aol.com To: xung03@aol.com From: xung03@aol.com Subject: Hog(DA913529,email) JmW yB Q eoP . => xung03@aol.com To: xung03@aol.com From: xung03@aol.com Subject: Yq(DA913529,name)RiatdJ VoyY41ILqAdOjfxkvfKaH8JMobcYw . ::xung03@aol.com To: xung03@aol.com From: xung03@aol.com Subject: 9joI(DA913529,add1)e6WS1maM J . ::xung03@aol.com To: xung03@aol.com From: xung03@aol.com Subject: U84QoU(DA913529,add2)wIfhxuNg 97ob4Cn3k0VauKEoM74hIYt . ::xung03@aol.com To: xung03@aol.com From: xung03@aol.com Subject: qI6(DA913529,city) XN8s Akd xjLmZqTf0s15E4688jkblKj . ::xung03@aol.com To: xung03@aol.com From: xung03@aol.com Subject: (DA913529,zip)Pxia 3i HvHE0tfDHxxSf0CF6W Kyi0WHeieL BZBAFcszbJGEgO1ha:: Okay, maybe I'm the idiot for not preparing for such attacks. Anyway, I need some regexes to prevent this from happening again.

Can someone help me write a regex that for the email address field will substitute anything after a SPACE or a COMMA will be removed before it gets stored to file? I figure if I remove both of these, it doesn't matter what the person tries to put in as their email address, it'll simply be lost. (unless you know of better ways?)

Another problem is, I'm using your basic sendmail mail script To: $adminmail From: $usermail Subject: $subject.. print mail "$message".... Since each of these fields are being processed through the mail script, I have the feeling they could screw up the script with ANY one of these fields. I can't break on SPACES for the name and address fields as they require spaces between the first and last name. Any ideas on what to do about these? I have -t on with sendmail, so hopeully that is doing something.

In reply to preventing malicious mail attacks by Anonymous Monk

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