isEmail feature

[AkaeyesWanabe]

Results-of-ValidatorJS.pdf

There is a problem in validation of some email addresses

You can see the joined document. it's a test of your isEmail validation script.

[WikiRik]

Could you share the text contents of the PDF in this file? Or as image?
Due to security concerns I'd rather not open random PDFs

[AkaeyesWanabe]

OK i see. Sorry for the late.

[AkaeyesWanabe]

this is emails addresses list (You can try yourself):

-- invalid addresses from Wikipedia resource
invalid
#, 011, ASCII@ASCII.ASCII, new-long, Long ASCII
abc.example.com
#, 012, ASCII@ASCII.ASCII, new-long, Long ASCII
a@b@c@example.com
#, 013, ASCII@ASCII.ASCII, new-long, Long ASCII
a"b(c)d,e:f;gi[j\k]l@example.com
#, 014, ASCII@ASCII.ASCII, new-long, Long ASCII
just"not"right@example.com
#, 015, ASCII@ASCII.ASCII, new-long, Long ASCII
this is"not\allowed@example.com
#, 016, ASCII@ASCII.ASCII, new-long, Long ASCII
this\ still"not\allowed@example.com
#, 017, ASCII@ASCII.ASCII, new-long, Long ASCII
1234567890123456789012345678901234567890123456789012345678901234+x@example.com
#, 018, ASCII@ASCII.ASCII, new-long, Long ASCII
i.like.underscores@but_they_are_not_allowed_in_this_part

-- valid addresses from Wikipedia resource
valid
#, 200, ASCII@ASCII.ASCII, new-long, Long ASCII
x@example.com
#, 201, ASCII@ASCII.ASCII, new-long, Long ASCII
x@example.com
#, 202, ASCII@ASCII.ASCII, new-long, Long ASCII
long.email-address-with-hyphens@and.subdomains.example.com
#, 203, ASCII@ASCII.ASCII, new-long, Long ASCII
user.name+tag+sorting@example.com
#, 204, ASCII@ASCII.ASCII, new-long, Long ASCII
name/surname@example.com
#, 205, ASCII@ASCII.ASCII, new-long, Long ASCII
admin@example
#, 206, ASCII@ASCII.ASCII, new-long, Long ASCII
example@s.example
#, 207, ASCII@ASCII.ASCII, new-long, Long ASCII
" "@example.org
#, 208, ASCII@ASCII.ASCII, new-long, Long ASCII
"john..doe"@example.org
#, 209, ASCII@ASCII.ASCII, new-long, Long ASCII
mailhost!username@example.org
#, 210, ASCII@ASCII.ASCII, new-long, Long ASCII
"very.(),:;<>[]".VERY."very@\ "very".unusual"@strange.example.com
#, 211, ASCII@ASCII.ASCII, new-long, Long ASCII
user%example.com@example.org
#, 212, ASCII@ASCII.ASCII, new-long, Long ASCII
user-@example.org
#, 213, ASCII@ASCII.ASCII, new-long, Long ASCII
postmaster@[123.123.123.123]
#, 214, ASCII@ASCII.ASCII, new-long, Long ASCII
postmaster@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]
#, 215, ASCII@ASCII.ASCII, new-long, Long ASCII
_test@[IPv6:2001:0db8:85a3:0000:0000:8a2e:0370:7334]

-- validated addresses from the UASG resource with corresponding index as id
valid
#, 32, ASCII@ASCII.ASCII, new-long, Long ASCII
email-test@universal-acceptance-test.international
#, 33, ASCII@ASCII.ASCII, new-short, Short ASCII
email-test@universal-acceptance-test.icu
#, 34, Unicode@IDN.IDN, RTL, Arabic
تجربة-بريد-الكتروني@تجربة-القبول-الشامل.موريتانيا
#, 35, Unicode@IDN.IDN, , Armenian
Էլփոստ-թեստ@համընդհանուր-ընկալում-թեստ.հայ
#, 36, Unicode@IDN.IDN, , Bengali Bangla
ই-মেইল-পরীক্ষা@সর্বজনীন-স্বীকৃতির-পরীক্ষা.ভারত
#, 37, Unicode@IDN.IDN, , Cyrillic
почта-тест@универсальное-принятие-тест.москва
#, 38, Unicode@IDN.IDN, , Devanagari
ईमेल-परीक्षण@सार्वभौमिक-स्वीकृति-परीक्षण.संगठन
#, 39, Unicode@IDN.IDN, , Georgian
ფოსტის-ტესტი@უნივერსალური-თავსობადობის-ტესტი.გე
#, 40, Unicode@IDN.IDN, , Greek
ηλεκτρονικό-μήνυμα-δοκιμή@καθολική-αποδοχή-δοκιμή.ευ
#, 41, Unicode@IDN.IDN, , Gujarati
ઇમેઇલ-પરીક્ષણ@સાર્વત્રિક-સ્વીકૃતિ-પરીક્ષણ.ભારત
#, 42, Unicode@IDN.IDN, , Gurmukhi
ਈਮੇਲ-ਪਰਖ@ਸਰਵਵਿਆਪਕ-ਪ੍ਰਵਾਨਗੀ-ਪਰਖ.ਭਾਰਤ
#, 43, Unicode@IDN.IDN, , Hangul
이메일테스트@다국어도메인이용환경테스트.한국
#, 44, Unicode@IDN.IDN, RTL, Hebrew
מבחן-דואר-אלקטרוני@מבחן-קבלה-אוניברסלי.קום
#, 45, Unicode@IDN.IDN, , Hiragana
めーるてすと@どこでもつかえる.みんな
#, 46, Unicode@IDN.IDN, , Kannada
ಇ-ಅಂಚೆ-ಪರೀಕ್ಷೆ@ಸಾರ್ವತ್ರಿಕ-ಸ್ವೀಕಾರಾರ್ಹತೆ-ಪರೀಕ್ಷೆ.ಭಾರತ
#, 47, Unicode@IDN.IDN, , Katakana
メールテスト@ユニバーサルアクセプタンス.クラウド
#, 48, Unicode@IDN.IDN, , Lao
ອີເມວ-ທົດລອງ@ສາກົນ-ການຍອມຮັບ-ທົດລອງ.ລາວ
#, 49, Unicode@IDN.IDN, , Latin
Email-test@Universales-Akzeptanz-Test.vermögensberatung
#, 50, Unicode@IDN.IDN, , Malayalam
ഇമെയിൽ-പരിശോധന@സാർവത്രിക-സ്വീകാര്യതാ-പരിശോധന.ഭാരതം
#, 51, Unicode@IDN.IDN, , Oriya
ଇମେଇଲ-ଟେଷ୍ଟ@ଯୁନିଭରସାଲ-ଏକସେପ୍ଟନ୍ସ-ଟେଷ୍ଟ.ଭାରତ
#, 52, Unicode@IDN.IDN, , Sinhala
ඉ-තැපැල්-පිරික්සුම@විශ්ව-සම්මුති-පිරික්සුම.ලංකා
#, 53, Unicode@IDN.IDN, , Tamil
மின்னஞ்சல்-சோதனை@பொது-ஏற்பு-சோதனை.சிங்கப்பூர்
#, 54, Unicode@IDN.IDN, , Telugu
ఇమెయిల్-పరీక్ష@యూనివర్సల్-ఆమోదం-పరీక్ష.భారత్
#, 55, Unicode@IDN.IDN, , Thai
อีเมลทดสอบ@ยูเอทดสอบ.ไทย
#, 56, Unicode@IDN.IDN, , Simplified Chinese
电子邮件测试@普遍适用测试.我爱你
#, 57, Unicode@IDN.IDN, , Traditional Chinese
電子郵件測試@普遍適用測試.台灣
#, 58, Unicode@IDN.ASCII, , Ethiopic
ኢሜይል-ሙከራ@ሁለንአቀፍ-ተቀባይነት-ሙከራ.com
#, 59, Unicode@IDN.ASCII, , Khmer
សារអេឡិកត្រូនិកសាកល្បង@ការសាកល្បងទទួលយកជាអន្តរជាតិ.com
#, 60, Unicode@IDN.ASCII, , Myanmar
အီးမေးလ်စမ်းသပ်ချက်@အလုံးစုံလက်ခံမှုစမ်းသပ်ချက်.com
#, 61, Unicode@IDN.ASCII, RTL, Thaana
އީމޭލު-ޓެސްޓު@ދުނިޔެ-ގަބޫލުކުރާ-ޓެސްޓު.com
#, 62, Unicode@IDN.ASCII, , Tibetan
གློག་འཕྲིན་བརྟག་དཔྱད@ཡོངས་ཁྱབ་ངོས་ལེན་བརྟག་དཔྱད.com
#, 73, ASCII@ASCII.IDN, RTL, Hebrew
email-test@universal-acceptance-test.קום
#, 74, IDN@IDN.ASCII, , Latin
email-épreuve@épreuve-acceptation-universelle.org
#, 75, IDN@IDN.ASCII, mailbox using uppercase letters, Latin
Email-Épreuve@épreuve-acceptation-universelle.org
#, 76, IDN@IDN.ASCII, domain in non-NFC normalization form, Latin
email-épreuve@épreuve-acceptation-universelle.org
#, 77, IDN@IDN.ASCII, mailbox in non-NFC normalization form, Latin
email-épreuve@épreuve-acceptation-universelle.org
#, 78, IDN@IDN.IDN, Ideographic Full Stop, Simplified Chinese
电子邮件测试@普遍适用测试。我爱你
#, 79, Unicode@IDN.IDN, RTL; A-label.U-label, Arabic
تجربة-بريد-الكتروني@xn-----ctdbabcfhu9c2b9l1acccr4c.موريتانيا
#, 80, Unicode@IDN.IDN, RTL; U-label.A-label, Arabic
تجربة-بريد-الكتروني@تجربة-القبول-الشامل.xn--mgbah1a3hjkrd
#, 81, Unicode@IDN.IDN, RTL; A-label.A-label, Arabic
تجربة-بريد-الكتروني@xn-----ctdbabcfhu9c2b9l1acccr4c.xn--mgbah1a3hjkrd
#, 82, ASCII@IDN.IDN, RTL; A-label.A-label, Arabic
email-test@xn-----ctdbabcfhu9c2b9l1acccr4c.xn--mgbah1a3hjkrd

[AkaeyesWanabe]

I can found a good regex for utf8 user email checking and quoted user email checking you can try these.

const emailUserUtf8Part = /^(?!\d)(?!...)[a-z\d!#$&'+-/=?^_`{|}~%.\u00A1-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+$/iu;

const quotedEmailUserUtf8 = /^([\s\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|(\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*$/iu;