Forum Discussion

PerBonomi's avatar
PerBonomi
Boss
5 years ago

RegEx to block an email and its variations

Hi folks, figure this might be a good place to ask. Now, realizing nothing is 100% fool- or troll proof, I was wondering if anyone here ever experimented with regex to try and block as many variatio...
  • Malcolm-M's avatar
    Malcolm-M
    5 years ago

    We block pretty much any email address then allow some through with negative lookahead.

    r:\b[\w.%+\-](?!buse)(?!iewerr)(?!kyboxofficesupport)(?!sername)(?!ccessories)(?!kysupport)(?!pps)(?!tvboxofficesupport)[\w.%+\-]+@[\w.\-](?!ky.uk)[\w.\-]+\.[A-Za-z]{2,6}(?!")(?!”)(?!.uk")(?!.uk”)\b

Malcolm-M's avatar
Malcolm-M
Boss

We block pretty much any email address then allow some through with negative lookahead.

r:\b[\w.%+\-](?!buse)(?!iewerr)(?!kyboxofficesupport)(?!sername)(?!ccessories)(?!kysupport)(?!pps)(?!tvboxofficesupport)[\w.%+\-]+@[\w.\-](?!ky.uk)[\w.\-]+\.[A-Za-z]{2,6}(?!")(?!”)(?!.uk")(?!.uk”)\b

Malcolm-M's avatar
Malcolm-M
Boss
5 years ago

Should add, there is a bit of repetition in there at the end due to having some problems allowing a specific bypass.