Mail binding errors sending mail UnsupportedDataTypeException: text/plaijn; charset=UTF=8

Hey,

i just set up my new openhab (openHAB 3.2.0, Release Build) and installed the mail binding (Mail - Bindings | openHAB). I get the same error like is it decribed in that posting - it does not matter if I use HTML oder plain mail or other smtp-servers / settings.

2022-03-29 13:41:02.104 [WARN ] [ab.binding.mail.internal.SMTPHandler] - javax.mail.MessagingException: IOException while sending message;
nested exception is:
javax.activation.UnsupportedDataTypeException: multipart/alternative;
boundary=“----=_Part_0_525284277.1648554060618”

The Bug reported on github is still open ([Mail] sendMail and sendHtmlFail errors for UI rules · Issue #11838 · openhab/openhab-addons · GitHub)

Are there any news on it?
Does anybody have a solution for that bug jet?

best wishes
Thomas

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