I have asked this same question and still have not been addressed. dont know WHERE to begin looking as I am new to this?! I will continue to try to solve.
I’m suffering the same mistake. the logs show that it has something to do with the variant: INTL_IDNA_VARIANT_UTS46
someone help???
Error
PHP
idn_to_ascii() expects parameter 3 to be long, string given at /home/vprnetbr/vprhost.com.br/nxc/lib/private/Mail/Mailer.php#212
5 minutes ago
Error
PHP
Use of undefined constant INTL_IDNA_VARIANT_UTS46 - assumed ‘INTL_IDNA_VARIANT_UTS46’ at /home/vprnetbr/vprhost.com.br/nxc/lib/private/Mail/Mailer.php#212