Comments on: Check Email Address with JavaScript and Regular Expressions http://www.marketingtechblog.com/2007/10/28/javascript-regex-emailaddress/ new media strategies and other marketing gems Mon, 01 Dec 2008 18:54:16 +0000 http://wordpress.org/?v=2.6.5 By: Szubu - LorenB http://www.marketingtechblog.com/2007/10/28/javascript-regex-emailaddress/#comment-224365 Szubu - LorenB Sun, 05 Oct 2008 06:16:40 +0000 http://www.douglaskarr.com/2007/10/28/javascript-regex-emailaddress/#comment-224365 btw, I really like what you have going on here, your tutorials are very simple, I will definately be bookmarking this one.... btw, I really like what you have going on here, your tutorials are very simple, I will definately be bookmarking this one…. ]]> By: Szubu http://www.marketingtechblog.com/2007/10/28/javascript-regex-emailaddress/#comment-224362 Szubu Sun, 05 Oct 2008 06:10:12 +0000 http://www.douglaskarr.com/2007/10/28/javascript-regex-emailaddress/#comment-224362 Hi there, I am tring to use this in an existing form in real-time, but this doesnt appear to be validating in realtime like your password strength checker... Or, am i just that clueless, and it aint workin for me? Hi there,

I am tring to use this in an existing form in real-time, but this doesnt appear to be validating in realtime like your password strength checker…

Or, am i just that clueless, and it aint workin for me?

]]> By: gemp http://www.marketingtechblog.com/2007/10/28/javascript-regex-emailaddress/#comment-189833 gemp Thu, 07 Aug 2008 14:25:02 +0000 http://www.douglaskarr.com/2007/10/28/javascript-regex-emailaddress/#comment-189833 There's much simpler way to write the expression: <code>var regex = /^[a-z0-9\._-]+@([a-z0-9_-]+\.)+[a-z]{2,6}$/i;</code> - With the final modifier /i there's no need to indicate the upper case range. - I don't know of any <acronym>TLD</acronym> with numbers in it. On a side note, I do allow TLD with up to 6 chars; new ones arrive regularly and you never know (well, somme future ones may even have numbers in it, I know). There’s much simpler way to write the expression:
var regex = /^[a-z0-9\._-]+@([a-z0-9_-]+\.)+[a-z]{2,6}$/i;
- With the final modifier /i there’s no need to indicate the upper case range.
- I don’t know of any TLD with numbers in it.
On a side note, I do allow TLD with up to 6 chars; new ones arrive regularly and you never know (well, somme future ones may even have numbers in it, I know). ]]> By: Android http://www.marketingtechblog.com/2007/10/28/javascript-regex-emailaddress/#comment-181477 Android Thu, 24 Jul 2008 10:32:50 +0000 http://www.douglaskarr.com/2007/10/28/javascript-regex-emailaddress/#comment-181477 Perfect, just what I needed! Perfect, just what I needed! ]]> By: Douglas Karr http://www.marketingtechblog.com/2007/10/28/javascript-regex-emailaddress/#comment-61744 Douglas Karr Fri, 02 Nov 2007 15:23:04 +0000 http://www.douglaskarr.com/2007/10/28/javascript-regex-emailaddress/#comment-61744 Hi Reg, You can test out the Regex utilizing an <a href="http://www.quanetic.com/regex.php">Online Regex Tester</a>. Also, there's definitely much more that can be done if you want to ensure an <a href="http://www.douglaskarr.com/2006/12/06/valid-email-address-length/">email address</a> is valid in accordance with the RFC. There are a few reasons not to allow someone to enter an invalid email address: 1. They will get annoyed at you when the email they expected doesn't get through - regardless of whether or not it was your fault the address was entered incorrectly. 2. If com.museum was a valid domain and, let's say, Yahoo! operated it - any email address that bounced would have a negative impact on your company's reputation for email delivery. This could lead to all of your company's email being blocked. 3. If your email service provider allowed you to enter bob@com.museum, you'd also pay for each email sent to that email address until they unsubscribed that address due to bounces. I would steer clear of any ESP that would allow an invalid email address like that - they're just taking your money! Thanks for stopping by! Doug Hi Reg,

You can test out the Regex utilizing an Online Regex Tester.

Also, there’s definitely much more that can be done if you want to ensure an email address is valid in accordance with the RFC.

There are a few reasons not to allow someone to enter an invalid email address:
1. They will get annoyed at you when the email they expected doesn’t get through - regardless of whether or not it was your fault the address was entered incorrectly.
2. If com.museum was a valid domain and, let’s say, Yahoo! operated it - any email address that bounced would have a negative impact on your company’s reputation for email delivery. This could lead to all of your company’s email being blocked.
3. If your email service provider allowed you to enter bob@com.museum, you’d also pay for each email sent to that email address until they unsubscribed that address due to bounces. I would steer clear of any ESP that would allow an invalid email address like that - they’re just taking your money!

Thanks for stopping by!
Doug

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