regex101: FI-Email2-final

^start of line

Character Class[-a-zA-Z0-9#$%'_]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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)

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 1(\.[-a-zA-Z0-9#$%'_]+)*

*repeats the group contents below any number of times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[-a-zA-Z0-9#$%'_]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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)

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 2(([a-zA-Z0-9]{1,2}|[a-zA-Z0-9][-a-zA-Z0-9]+[a-zA-Z0-9])\.)+

+repeats the group contents below at least once:

Group 3([a-zA-Z0-9]{1,2}|[a-zA-Z0-9][-a-zA-Z0-9]+[a-zA-Z0-9])

1st Alternative[a-zA-Z0-9]{1,2}

Character Class[a-zA-Z0-9]{1,2}

{1,2}matches between 1 and 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)

2nd Alternative[a-zA-Z0-9][-a-zA-Z0-9]+[a-zA-Z0-9]

Character Class[a-zA-Z0-9]

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[-a-zA-Z0-9]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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[a-zA-Z0-9]

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)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!\d+$)

\d+a digit, repeated at least once

$end of line

Character Class[a-zA-Z0-9]{2,4}

{2,4}matches between 2 and 4 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

Search reference

Regular Expression

^[-a-zA-Z0-9#$%'_]+(\.[-a-zA-Z0-9#$%'_]+)*@(([a-zA-Z0-9]{1,2}|[a-zA-Z0-9][-a-zA-Z0-9]+[a-zA-Z0-9])\.)+(?!\d+$)[a-zA-Z0-9]{2,4}$

Test String
New

Aba@example.com
test@test-test.com.com
test.abc-efg'@test-test.com.com.01111co
simple@example.com
very.common@example.com
other.email-with-hyphen@example.com
fully-qualified-domain@example.com
example-indeed@strange-example.com
example@s.example

Abc.example.com
A@b@c@example.com
just"not"right@example.com
this is"not\allowed@example.com
1234567890123456789012345678901234567890123456789012345678901234+x@example.com
john..doe@example.com
john.doe@example..com

test@-test.com

Regular Expression

Test StringNew

Test String
New