regex101: RFC 5322 email validation

Pro

^start of string

Group 1(((((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))?)?(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?<(((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)))>((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?))|(((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?))))

1st Alternative((((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))?)?(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?<(((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)))>((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?))

Group 2((((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))?)?(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?<(((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)))>((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?))

Group 3(((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\\([ -~]|\s))))*(\s? +)?"))?)?

?repeats the group contents below at most once:

Group 4((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\\([ -~]|\s))))*(\s? +)?"))?

?repeats the group contents below at most once:

1st Alternative(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)

Group 5(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)

Group 6((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?

?repeats the group contents below at most once:

1st Alternative(((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)

Group 7(((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)

Group 8((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))

Group 9(\s? +)?

?repeats the group contents below at most once:

\s?optionally matches any whitespace character

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

Group 10($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 11((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*

*repeats the group contents below any number of times:

Group 12(\s? +)?

?repeats the group contents below at most once:

\s?optionally matches any whitespace character

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

Group 13(([!-'*-[\]-~]*)|(\\([ -~]|\s)))

1st Alternative([!-'*-[\]-~]*)

Group 14([!-'*-[\]-~]*)

Character Class[!-'*-[\]-~]*

*matches any number of characters from the set below:

!-'one character from ! (33₁₀) to ' (39₁₀)

*-[one character from * (42₁₀) to [ (91₁₀)

\]-~one character from ] (93₁₀) to ~ (126₁₀)

2nd Alternative(\\([ -~]|\s))

Group 15(\\([ -~]|\s))

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Group 16([ -~]|\s)

1st Alternative[ -~]

Character Class[ -~]

-~one character from (32₁₀) to ~ (126₁₀)

2nd Alternative\s

\sany whitespace character

Group 17(\s? +)?

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group 18(\s? +)?

2nd Alternative(\s? +)

Group 20([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+

Group 21((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?

2nd Alternative(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\\([ -~]|\s))))*(\s? +)?")

Group 57(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?<(((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)))>((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)

2nd Alternative(((((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\$[ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)|(((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?($((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?$))(\s? +)?)|(\s? +))?)))

$end of string, or before its final line terminator

25 tokens

Regular Expression

^(((((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?)|(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\\([ -~]|\s))))*(\s? +)?"))?)?(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?<(((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?)|(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\\([ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?)|(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?)))>((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?))|(((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?)|(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?"((\s? +)?(([!#-[\]-~])|(\\([ -~]|\s))))*(\s? +)?"))@((((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?(([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+(\.([A-Za-z0-9!#-'*+\/=?^_`{|}~-])+)*)((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?)|(((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?\[((\s? +)?([!-Z^-~]))*(\s? +)?\]((((\s? +)?(\(((\s? +)?(([!-'*-[\]-~]*)|(\\([ -~]|\s))))*(\s? +)?\)))(\s? +)?)|(\s? +))?))))$

New

"Foo Bar" <foo.bar@baz.com>