Multiple email seperated by semicolon regex

Question

Hi guys i have a requirement such that i have to validate email addresses seperated by semicolon.For example "[email protected]; [email protected]" something like this.I am using the below regex :

(([^@]+@[^\s@]+\.[^\s@;]{2,}\;{0,1}\s*))+

The problem here it the regex works even if there is no semicolon in between but with space eg "[email protected] [email protected]".But That is not correct.so can anyone tell me how to achieve this?Also when there is a single email id no need of semi-colon in between

No..Its not the same.Actually that post was for regular expression.Mine i have the regular expression.But the space inbetween instead of semicolon also matching.Need to avoid that and how to do it is my question — Deepak Ramakrishnan Kalidass, Oct 09 '18 at 06:40
Another common way to achieving your requirement is to split the email string using ; as separator and then test for email validation. — Mrnell, Oct 09 '18 at 06:58

Ajanthan · Answer 1 · 2018-10-09T06:51:13.687

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found a working regex. Tested till 3 emails.

([^@]+@[^\s@]+.[^\s@;]{2,})+(\;([^@]+@[^\s@]+.[^\s@;]{2,}){1,1})*

Tested samples :

[email protected];[email protected];[email protected] -> true
[email protected];[email protected] [email protected] -> false
[email protected] -> true
[email protected]; -> false

Key thing here is to follow \w+(.\w+)+ pattern. Hope this helps

edited Oct 09 '18 at 06:51

answered Oct 09 '18 at 06:44

Ajanthan

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But when i try "[email protected]; [email protected]",it fails.I also need spaces or no space which so ever after the colon.What should i do? – Deepak Ramakrishnan Kalidass Oct 09 '18 at 07:18
May I know why do you need spaces? In real world application spaces will be trimmed out for emails. So you can do a replaceAll(" ", "") before the regex matching. – Ajanthan Oct 09 '18 at 08:03
Ok .That is ok..But i am also getting true for "[email protected];[email protected];tes".Thats maily where i am also stuck – Deepak Ramakrishnan Kalidass Oct 09 '18 at 09:14

Nambi_0915 · Answer 2 · 2018-10-09T09:22:36.290

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Try regex (?!.*;$)^([-\w]+?@\w+\.\w+(?:\s*;\s*)?)+$

This will match any no. of emails separated by a semicolon. The negative lookahead (?!.*;$) will not match email with a semicolon at last.

Regex

edited Oct 09 '18 at 09:22

answered Oct 09 '18 at 07:12

Nambi_0915

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This '[email protected]; [email protected]' should match because it has semicolon inside it doesn't matter extra space. It should not match if there is no semicolon and only space between two emails. – Pushpesh Kumar Rajwanshi Oct 09 '18 at 07:28
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Thank you so much.This works like a gem.Just that what should i do if i need some special characters in mail id like "[email protected]" ,because it is not accepting characters like '-' – Deepak Ramakrishnan Kalidass Oct 09 '18 at 09:17
Add what you want to include inside `[-\w]` – Nambi_0915 Oct 09 '18 at 09:23

Multiple email seperated by semicolon regex

2 Answers2