Regular Expressions 101

Explanation
Pro

Character Class[\w\.]+

+matches at least one character from the set below:

\wany word character

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Character Class[a-zA-Z_]+?

+?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)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 1(\.[a-zA-Z]{2,6})+

+repeats the group contents below at least once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-zA-Z]{2,6}

{2,6}matches between 2 and 6 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)

Global pattern flags

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

Detailed match information will be displayed here automatically.

26 tokens

[\w\.]+@[a-zA-Z_]+?(\.[a-zA-Z]{2,6})+

New

// Valid
mail@mail.ru
mail.mail@mail.ru
mail@mail.mail.ru

// Invalid
@.ru
@mail.ru
mail.ru
mail@mail
mail@mail.mail.

// Valid
mail@mail.ru
mail.mail@mail.ru
mail@mail.mail.ru

// Invalid
@.ru
@mail.ru
mail.ru
mail@mail
mail@mail.mail.