Filtering any email address

Question

I have an authorizer function which needs to check email rules with wildcards e.g.

so e.g.

I am a bit stuck on how to best construct a regex - or maybe there are other out of the box solutions? Appreciate any help! Thanks

Regex isn't the best way to go here. The full-up e-mail standard is ***phenomenally*** complicated. What platform are you on? Odds are there's a library that does it better than a roll-your-own regex ever could. — Sebastian Lenartowicz, Jul 03 '17 at 20:56
What language/environment will you be implementing your regex in? — mickmackusa, Jul 03 '17 at 23:22
Possible duplicate of [Using a regular expression to validate an email address](https://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address) — Daniel Beck, Jul 04 '17 at 01:43

score 0 · Accepted Answer · answered Jul 03 '17 at 21:08

0

Try this regex ([a-zA-Z0-9-_\.]*)\@(.*?.in|.*?myapp.*)
Demo https://regex101.com/r/D6thOr/1

answered Jul 03 '17 at 21:08

lkdhruw

score 0 · Answer 2 · answered Jul 04 '17 at 01:33

Pattern:

/^[^@]+@(?:(?:myapp\..+)|.+(?:\.in|myapp\.com))$/

Test Cases:

I used non-capturing groups, but you can use capture groups for pattern brevity if you wish.

I have ordered the "alternatives" with shorter mismatching patterns before longer ones for efficiency.

I also used a negated character class instead of a dot before @ for speed reasons.

2 Answers2