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← GalleryRFC5322 email address validation (maybe FEWER STEPS !)✨ Emoji Combos

/^(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+(?>(?>[\w\d!#-'*+\/=?^`{-~-]++|(?>"(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!#-\[\]-\x7f]++|\\[\x00-\x7f]))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+"))(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+(?>\.(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+(?>[\w\d!#-'*+\/=?^`{-~-]++|(?>"(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!#-\[\]-\x7f]++|\\[\x00-\x7f]))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+"))(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+)*+)@(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+(?>[\w\d!#-'*+\/=?^`{-~-]++(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+(?>\.(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+[\w\d!#-'*+\/=?^`{-~-]++(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+)*+|\[(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-Z^-\x7f]++|\\[\x00-\x7f]))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+\](?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>(?>($(?>(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+(?>[\x01-\x08\x0b\x0c\x0e-\x1f!-'*-\[\]-\x7f]++|\\[\x00-\x7f]|(?-1)))*+(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+$)(?>[ \t]++(?>\r\n[ \t]++)*+|\r\n[ \t]++)?+)++)?+)?+)$/gmPCRE2+12 years ago✓ Pre-loaded

About this regex

A fully RFC 5322-compliant email address validator that supports dot-atom and quoted-string local parts, dot-atom domains, bracketed domain literals ([...]), nested comments via subroutine recursion ((?-1)), and folded whitespace (CRLF followed by spaces/tabs) as allowed in mail headers. It uses PCRE2 atomic groups (?>...) and possessive quantifiers (++/*+/?+) throughout to lock in matches and drastically reduce backtracking steps. Anchored with ^...$ in multiline mode, it's suited for strict addr-spec validation in mail parsers and header processing.

email rfc5322 validation possessive-quantifiers recursion

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← GalleryRFC5322 email address validation (maybe FEWER STEPS !)✨ Emoji Combos

About this regex

email rfc5322 validation possessive-quantifiers recursion

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