#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "(?m)<a[\s\S]*? \bhref="(mailto:(.*?))"[\s\S]*?>(.*?)</a>"
Local $sString = "<p>Lorem ipsum dolor sit amet, <a href="#coucou">consectetur </a> dipiscing elit. <a href="mailto:fakeEmail@gmail.com">Email Tag Content 1</a>.Sic enim censent, oportunitatis esse beate vivere. Omnia contraria, quos etiam insanos esse vultis. Virtutis, magnitudinis animi, patientiae, fortitudinis fomentis dolor mitigari solet. <a href="mailto:email@address.uk">Quid</a>, cum fictas fabulas, e quibus utilitas nulla elici potest, cum voluptate legimus? Duo Reges: <a href="mailto:tt@tt.com" class="asdkfj">constructio</a> interrete. Vos autem cum perspicuis dubia debeatis illustrare, dubiis perspicua conamini tollere. Quid ad utilitatem <a class="t" href="mailto:aaa@uuu.ik">tantae</a> pecuniae? Quod non subducta utilitatis ratione effici solet, sed ipsum a se oritur et sua sponte nascitur."
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