[Mailer] Support unicode email addresses

Author: javiereguiluz

mailer.rst

@@ -542,6 +542,10 @@ both strings or address objects::
         // email address as a simple string
         ->from('[email protected]')
 
+        // non-ASCII characters are supported both in the local part and the domain;
+        // if the SMTP server doesn't support this feature, you'll see an exception
+        ->from('jânë.dœ@ëxãmplę.com')
+
         // email address as an object
         ->from(new Address('[email protected]'))
 
@@ -556,6 +560,11 @@ both strings or address objects::
         // ...
     ;
 
+.. versionadded:: 7.2
+
+    Support for non-ASCII email addresses (e.g. ``jânë.dœ@ëxãmplę.com``)
+    was introduced in Symfony 7.2.
+
 .. tip::
 
     Instead of calling ``->from()`` *every* time you create a new email, you can