Re: regexp to only allow for formally valid email addresses

I agree with the suggestions to use a ready-made regexp. But if for some reason I had to reinvent one, I'd extend the \w token as much as necessary rather than go from scratch, something like...

$spammer = length($f{'Email'})
  && $f{'Email'} !~ /^(^\w|\-|\.)+\@(\w|\-|\.)+$/;
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-M

Free your mind

Comment on Re: regexp to only allow for formally valid email addresses Download Code

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Re^2: regexp to only allow for formally valid email addresses by fraktalisman (Hermit) on Mar 08, 2007 at 11:33 UTC
Word characters (\w) might include local characters like German Ä ö ü ß on a German webserver. Although these Umlaut characters should be, in theory, valid in email adresses (in my interpretation of RFC 822), I know from experience that their occurence in email addresses usually causes problems sooner or later. At least one German provider (T-Online) used to allow for those chars, but I would rather disallow and have the user enter an email address which is safe for international use. _{fraktalisman keeps rolling}	[reply]

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Re^2: regexp to only allow for formally valid email addresses
by fraktalisman (Hermit) on Mar 08, 2007 at 11:33 UTC

Word characters (\w) might include local characters like German Ä ö ü ß on a German webserver. Although these Umlaut characters should be, in theory, valid in email adresses (in my interpretation of RFC 822), I know from experience that their occurence in email addresses usually causes problems sooner or later. At least one German provider (T-Online) used to allow for those chars, but I would rather disallow and have the user enter an email address which is safe for international use.

_{fraktalisman keeps rolling}

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