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

SendHtmlMail has been fixed after the 3.3 release and is included in current SNAPSHOTS and upcoming Milestone.

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Please use SendMail instead of SendHtmlMail in the script. Then the play button of the rule works again. Hans-Jörg has already pushed a fix for the up comming OH3.4.
Then it should work out-of-the box. In OH3.3 the SendMail works but SendHtmlMail is not working.
I changed some weeks ago in all my rules and all works as expected.
Thanks to Hans-Jörg…