Date: Wed, 02 Jan 2002 17:22:22 -0500 From: Simon Morton <simon.morton@verizon.net> To: freebsd-questions@FreeBSD.ORG Subject: Re: Regex Question - email matching Message-ID: <3C33881E.9030506@verizon.net> References: <200201021839.g02IdLG68388@lurza.secnetix.de>
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Don't worry, I won't be filtering any email addresses using this code.
I just typed it in off the top of my head as an improvement over the
regexp than was originally posted. Not surprising that a couple of the
finer points of RFC 2822 escaped me ;-)
The "correct" regexp for validating email addresses is left as an
exercise for the reader.
Simon
Oliver Fromme wrote:
> Simon Morton <simon.morton@verizon.net> wrote:
> > if ( $email =~ /^([\w\.\-]+)\@([\w\.\-]+)\.([[:alpha:]]+)$/ ) {
> > [...]
> > } else {
> > print "Invalid email address\n";
>
> Then you would be rejecting a lot of valid addresses.
> For example, they can contain "+". On the other hand,
> it would accept "_" in domain names which is illegal.
>
> Please -- if someone is accepting or rejecting email
> addresses based on some regular expression, _PLEASE_
> read RFC 2822 first, and in particular section 3.4
> titled "address specification". Otherwise you might
> cause some trouble and grief to your users.
>
> The format of valid email addresses is more complicted
> than many people think.
>
> Regards
> Oliver
>
>
--
http://www.SimonMorton.com
smorton at acm dot org
\rm -rf /bin/laden
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