[151166] in North American Network Operators' Group
Re: Programmers with network engineering skills
daemon@ATHENA.MIT.EDU (Jeroen van Aart)
Mon Mar 12 19:24:08 2012
Date: Mon, 12 Mar 2012 16:22:53 -0700
From: Jeroen van Aart <jeroen@mompl.net>
To: NANOG list <nanog@nanog.org>
In-Reply-To: <728A9697-AD60-482A-A533-E7868CFF9546@delong.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Owen DeLong wrote:
> http://en.wikipedia.org/wiki/Email_address#Valid_email_addresses
>
> You may have noticed my particular test wouldn't accept foo!bar!ucbvax!user format addresses, either.
>
> It works well enough for my purposes. I did not claim it was perfect.
Why not leave it to the MTA to decide what is a valid address? It only
requires a few SMTP commands to the MTA to know if it will accept it.
Normally the MTA will tell you after the "rcpt to:" command if it will
accept it (i'm ignoring some badly behaving MTAs who will swallow
anything and then bounce, no point trying to work around such crap).
No need to re-invent the wheel, unless you're actually creating an MTA
or something similar.
Who is to say that even IF your address verifier verifies it as valid
that the MTA is configured to allow it (or the other way around)? MTAs
can be arbitrarily configured to (dis)allow "bang path" addresses, IP
addresses etc.
Regards,
Jeroen
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