PunyCode for E-mail Addresses

[Hanmac]

E-mail Addresses should be punified before going into the Transport:

Zend_Mail_Protocol_Exception: 5.1.8 UTF-8 addresses not supported

in vendor/shardj/zf1-future/library/Zend/Mail/Protocol/Abstract.php:470
Stack trace:
#0 vendor/shardj/zf1-future/library/Zend/Mail/Protocol/Smtp.php(284): Zend_Mail_Protocol_Abstract->_expect()
#1 vendor/shardj/zf1-future/library/Zend/Mail/Transport/Smtp.php(211): Zend_Mail_Protocol_Smtp->rcpt()
#2 vendor/shardj/zf1-future/library/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Smtp->_sendMail()
#3 vendor/shardj/zf1-future/library/Zend/Mail.php(1201): Zend_Mail_Transport_Abstract->send()

Example E-Mail: hällo@händler.com

How it could be done:

$url = "hällo@händler.com";

$parsedUrl = parse_url("smtp://" . $url);

$host = idn_to_ascii($parsedUrl['host']);
$url = str_replace($parsedUrl['host'], $host, $url);
var_dump($url); #=> "hällo@xn--hndler-bua.com"

Ref: OpenMage/magento-lts#4918

Maybe related Issue #477 (both are about normalizing the host part)

[develart-projects]

But you actually have UTF domains, aren't you?

[Hanmac]

But you actually have UTF domains, aren't you?

• https://en.wikipedia.org/wiki/Email_address#Local-part more likely to have UTF-8 allowed
• https://en.wikipedia.org/wiki/Email_address#Domain doesn't really allow UTF-8

So it probably depends on the Mail-Server, if they allow UTF-8 in the Domain part