Way to Validate Email Addresses

RE: Way to Validate Email Addresses

Mike Schmitt — Tue, 11 Jan 2022 17:08:21 GMT

Since this zombie thread has already been dredged back up anyway....

A while ago I switched to a regex-based validation solution because despite the best updates to the OOB approach posted below originally, there were still corner cases that were hard to handle sufficiently without the inherent power of RegEx matching.

The RegEx originally posted by Shailendras almost 6 years ago fails in some valid and common corner cases, including name or domain parts with multiple pieces separated by ".", such as "mike@mail.appian.com" etc.

Eventually I was able to work up the following RegEx match function by a combination of a few different sources and my own testing, which passes a fairly robust set of test cases, screenshotted below:

regexmatch(
  pattern: "^[A-Z0-9\'\+\&\%_-]+(\.{0,1}[A-Z0-9\'\+\&\%_-]+)*[@]{1}[A-Z0-9.-]*[A-Z0-9-]+[.]{1}[A-Z]{2,6}$",
  searchString: ri!email,
  regexFlags: "si"
)

The above code simply replaced my old, OOTB code in the expression rule I'd been using (i actually kept it, but commented out, for posterity).

I should also note that the modern version of the People Functions plug-in seems to have a built-in expression funciton, validateEmailAddress(), which I can confirm passes all of the above test cases as well.

RE: Way to Validate Email Addresses

rwandam0001 — Tue, 11 Jan 2022 07:29:43 GMT

The fully RFC 822 compliant regex is inefficient and obscure for validate email address because of its length. Fortunately, RFC 822 was superseded twice and the current specification for email addresses is RFC 5322. RFC 5322 leads to a regex that can be understood if studied for a few minutes and is efficient enough for actual use.

If you use HTML5, use this code:

RE: Way to Validate Email Addresses

deepakk0018 — Tue, 04 Jan 2022 10:30:56 GMT

thanks MIke

RE: Way to Validate Email Addresses

colleeny — Wed, 08 May 2019 13:28:01 GMT

Thanks Mike - this was extremely helpful!

RE: Way to Validate Email Addresses

Harish G Nair — Thu, 18 Apr 2019 21:11:58 GMT

Thanks Mike!

RE: Way to Validate Email Addresses

darrynj — Thu, 07 Apr 2016 06:30:34 GMT

Thank you all **

RE: Way to Validate Email Addresses

darrynj — Thu, 07 Apr 2016 06:29:39 GMT

Thank all.

RE: Way to Validate Email Addresses

Mike Schmitt — Thu, 07 Apr 2016 02:08:30 GMT

The code I posted in the above linked thread is something I've worked on a lot in the past, to make sure it's robust and flexible (though a regex solution might still be admittedly more powerful). I'm attaching the latest version of my generalized rule here if anyone wants to refer to it. I guess the pro of this rule is that it's OOB and fairly easy to understand and tweak as needed.

Email Validation.sail

RE: Way to Validate Email Addresses

shailendras593 — Thu, 07 Apr 2016 01:35:34 GMT

Adding to what @philb said above, you can use the below code snippet to validate email address through regex plugin.

regexmatch("\\b[A-Z0-9._%-]+@[A-Z0-9.-]+\\.[A-Z]{2,4}\\b",ri!email)

RE: Way to Validate Email Addresses

PhilB — Thu, 07 Apr 2016 01:10:57 GMT

You could also use the regex plugin and validate the addresses with a regular expression.

RE: Way to Validate Email Addresses

Colton Beck — Thu, 07 Apr 2016 00:44:56 GMT

This post might be helpful:

forum.appian.com/.../b-50780