Re: Re: regex to validate e-mail addresses and phone numbers

b10m,
While I agree with your suggestion of Email::Valid in principal, it may not be the right solution for the task at hand. I am guessing there is more to this than was originally stated. It might be best to first ask some simple questions:

Am I validating inbound, outbound, or bi-directional addresses?

Does my inbound MTA comply with the RFCs? If not is it more strict, more relaxed, or bits and pieces of both?

Do I care if it is valid? If it "looks" like a spammer, I want to drop it regardless.

It may turn out that a home-grown regex is the right way to go, it may turn out that Email::Valid or Email::Valid::Loose is the way to go. It may even turn out that the best solution is SpamAssasin.

Cheers - L~R

Comment on Re: Re: regex to validate e-mail addresses and phone numbers

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Re: Re: Re: regex to validate e-mail addresses and phone numbers by makar (Novice) on Feb 10, 2004 at 16:37 UTC
Forgive my newbieness in asking, but I was taught that using a premade package like Valid is the best solution 99% of the time, and that most of the 1% was for when space/cpu and such were at issue. So I am wondering what would make you lean towards a home-grown solution over the module? Thank you in advance. ~Adam Marquis	[reply]
Re: Re: Re: Re: regex to validate e-mail addresses and phone numbers by Limbic~Region (Chancellor) on Feb 10, 2004 at 16:56 UTC
makar, Have you ever heard of an XY problem? It is when someone asks how to do Y when they really want to do X. They ask how to do Y because they believe it is the best way to accomplish X. The people that they ask go through many iterations of "try this", followed by "that won't work because of". I am not suggesting to use something other than Email::Valid if that truly is what is desired. What I am saying that is depending on the circumstance, other solutions may be the way to go. For instance, say the problem is receiving spam messages from addresses that include % symbols and @ signs. You believe that it isn't a valid email address since you have never seen it before. You use Email::Valid and you find out that it is very valid and is a common trick for open-relays. Hmmmm - what do I do? You create your own regex that says I do not care if this is valid, no legitimate mail I receive uses this syntax so I am going to get rid of it. Cheers - L~R	[reply]
Re: Re: Re: Re: Re: regex to validate e-mail addresses and phone numbers by makar (Novice) on Feb 10, 2004 at 17:09 UTC
Understood, thank you very much.	[reply]


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