ICS SmtpClient Mime Header Encode

[alf.krause 0]

How can I MIME encode the subject and sender (RFC2047)? Some providers now require this, for example, web.de.

https://postmaster.web.de/en/case?c=r0710

This case:
In case you use Non-ASCII characters like accented letters or symbols, please consider RFC 2047. For these characters you must use MIME encoding.
As soon as the corrections have been made by you, you can deliver emails to our system again.

Edited 2 hours ago by alf.krause