regex101: .NET 10.0 (C#) Match Workspace

Pro

^start of line

Non-Capturing Group(?:(?!\.)(?:[\w]+(?:(?![.+%/!-])?[.+%/!-])?)*[^.\s]|"".+"")

1st Alternative(?!\.)(?:[\w]+(?:(?![.+%/!-])?[.+%/!-])?)*[^.\s]

Negative Lookahead(?!\.)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[\w]+(?:(?![.+%/!-])?[.+%/!-])?)*

*repeats the group contents below any number of times:

Character Class[\w]+

+matches at least one character from the set below:

\wa Unicode word character

Non-Capturing Group(?:(?![.+%/!-])?[.+%/!-])?

?repeats the group contents below at most once:

Negative Lookahead(?![.+%/!-])?

?repeats the group contents below at most once:

Character Class[.+%/!-]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[.+%/!-]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Negated Character Class[^.\s]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\sa Unicode whitespace character

2nd Alternative"".+""

""the literal " (34₁₀ / 42₈ / 22₁₆)

.+any Unicode character (except for line terminators), repeated at least once

""the literal " (34₁₀ / 42₈ / 22₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Non-Capturing Group(?:\[(?:\d{3}\.?){4}\]|\[IPv6(?::[0-9a-z]{4})+\]|(?:[a-zA-Z0-9]{1,}[.-])+(?:[a-zA-Z0-9]{2,})+?)

1st Alternative\[(?:\d{3}\.?){4}\]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Non-Capturing Group(?:\d{3}\.?){4}

{4}repeats the group contents below exactly 4 times:

\d{3}a Unicode decimal digit, repeated exactly 3 times

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

2nd Alternative\[IPv6(?::[0-9a-z]{4})+\]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

IPv6the literal text IPv6 (case sensitive)

Non-Capturing Group(?::[0-9a-z]{4})+

+repeats the group contents below at least once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-9a-z]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

3rd Alternative(?:[a-zA-Z0-9]{1,}[.-])+(?:[a-zA-Z0-9]{2,})+?

Non-Capturing Group(?:[a-zA-Z0-9]{1,}[.-])+

+repeats the group contents below at least once:

Character Class[a-zA-Z0-9]{1,}

{1,}matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[.-]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:[a-zA-Z0-9]{2,})+?

+?repeats the group contents below at least once:

Character Class[a-zA-Z0-9]{2,}

{2,}matches at least 2 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

^(?:(?!\.)(?:[\w]+(?:(?![.+%/!-])?[.+%/!-])?)*[^.\s]|"".+"")@(?:\[(?:\d{3}\.?){4}\]|\[IPv6(?::[0-9a-z]{4})+\]|(?:[a-zA-Z0-9]{1,}[.-])+(?:[a-zA-Z0-9]{2,})+?)$

New

test@test.com
thiis+@test.ua.com
tis.will+work@gm.com
simple@example.com
very.common@example.com
FirstName.LastName@EasierReading.org
x@example.com
long.email-address-with-hyphens@and.subdomains.example.com
user.name+tag+sorting@example.com
name/surname@example.com
admin@example
example@s.example
" "@example.org
"john..doe"@example.org
mailhost!username@example.org
"very.(),:;<>[]\".VERY.\"very@\\ \"very\".unusual"@strange.example.com
user%example.com@example.org
user-@example.org
postmaster@[123.123.123.123]
postmaster@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]
_test@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]
abc.example.com
a@b@c@example.com
a"b(c)d,e:f;g<h>i[j\k]l@example.com
just"not"right@example.com 
this is"not\allowed@example.com
this\ still\"not\\allowed@example.com
1234567890123456789012345678901234567890123456789012345678901234+x@example.com
i.like.underscores@but_they_are_not_allowed_in_this_part.com

Extraction

test@test.com
thiis+@test.ua.com
tis.will+work@gm.com
simple@example.com
very.common@example.com
FirstName.LastName@EasierReading.org
x@example.com
long.email-address-with-hyphens@and.subdomains.example.com
user.name+tag+sorting@example.com
name/surname@example.com
admin@example
example@s.example
" "@example.org
"john..doe"@example.org
mailhost!username@example.org
"very.(),:;<>[]\".VERY.\"very@\\ \"very\".unusual"@strange.example.com
user%example.com@example.org
user-@example.org
postmaster@[123.123.123.123]
postmaster@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]
_test@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]
abc.example.com
a@b@c@example.com
a"b(c)d,e:f;g<h>i[j\k]l@example.com
just"not"right@example.com 
this is"not\allowed@example.com
this\ still\"not\\allowed@example.com
1234567890123456789012345678901234567890123456789012345678901234+x@example.com
i.like.underscores@but_they_are_not_allowed_in_this_part.com