#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?m)^(([^@]|[a-zA-Z\d.+ -]*)(?=@)@([a-zA-Z\d-]*)\.[a-zA-Z]+)$"
Local $sString = "Valid email addresses" & @CRLF & _
"" & @CRLF & _
"123@321.tld" & @CRLF & _
"" & @CRLF & _
"prettyandsimple@example.com" & @CRLF & _
"very.common@example.com" & @CRLF & _
"disposable.style.email.with+symbol@example.com" & @CRLF & _
"other.email-with-dash@example.com" & @CRLF & _
"x@example.com" & @CRLF & _
""much.more unusual"@example.com" & @CRLF & _
""very.unusual.@.unusual.com"@example.com" & @CRLF & _
""very.(),:;<>[]\".VERY.\"very@\\ \"very\".unusual"@strange.example.com" & @CRLF & _
"example-indeed@strange-example.com" & @CRLF & _
"admin@mailserver1" & @CRLF & _
"#!$%&'*+-/=?^_`{}|~@example.org" & @CRLF & _
""()<>[]:,;@\\\"!#$%&'-/=?^_`{}| ~.a"@example.org" & @CRLF & _
"" "@example.org" & @CRLF & _
"example@localhost" & @CRLF & _
"example@s.solutions" & @CRLF & _
"user@localserver" & @CRLF & _
"user@tt" & @CRLF & _
"user@[IPv6:2001:DB8::1]" & @CRLF & _
"" & @CRLF & _
"" & @CRLF & _
"Invalid email addresses[edit]" & @CRLF & _
"saas@saas" & @CRLF & _
"123@321.345" & @CRLF & _
"Abc.example.com" & @CRLF & _
"A@b@c@example.com" & @CRLF & _
"a"b(c)d,e:f;g<h>i[j\k]l@example.com" & @CRLF & _
"just"not"right@example.com" & @CRLF & _
"this is"not\allowed@example.com" & @CRLF & _
"this\ still\"not\\allowed@example.com" & @CRLF & _
"john..doe@example.com" & @CRLF & _
"with caveat: Gmail lets this through, Email address#Local-part the dots altogether" & @CRLF & _
"john.doe@example..com"
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm