regex101: Email address validator

^start of line

\w+a Unicode word character, repeated at least once

Group 1([.-]?\w+)*

*repeats the group contents below any number of times:

Character Class[.-]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\w+a Unicode word character, repeated at least once

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\w+a Unicode word character, repeated at least once

Group 2([.-]?\w+)*

*repeats the group contents below any number of times:

Character Class[.-]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\w+a Unicode word character, repeated at least once

Group 3(\.\w{2,})+

+repeats the group contents below at least once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w{2,}a Unicode word character, repeated at least 2 times

$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+([.-]?\w+)*@\w+([.-]?\w+)*(\.\w{2,})+$

New

Examples of what passes/fails this Regex:
one@send.co
one@send.io
one@send.com
one.two@send.com
one.two.three@send.com
_one@send.com
one@send_it_.com
one-two@send-it.com
123@send.com
-one@send.com
one-@send.com
one@-send.com
one@send-.com

Extraction

Examples of what passes/fails this Regex:
one@send.co
one@send.io
one@send.com
one.two@send.com
one.two.three@send.com
_one@send.com
one@send_it_.com
one-two@send-it.com
123@send.com
-one@send.com
one-@send.com
one@-send.com
one@send-.com