I'm trying to send emails with symfony 3.4 and when I'm sending to an email with German Umlaut in the domain like mail@thomas.müller.de - which since a while is actually an allowed format - I get the following error message:
Address in mailbox given [mail@thomas.müller.de] does not comply with RFC 2822, 3.6.2.
So ... yeah that sucks. Is there already a workaround, maybe a parameter that I can set? I do not really want to implement my own solution if there already is something (probably far better tested than my solution would ever be).
