Wrong conversion of HTML charset in background

Maybe it's better if I use a new topic for this issue, already present in "HTML attachment in a mail"

Hi all,

I'm using 4.7 and in a workflow for travel requests I use a custom method to send an html mail containing the TR overview: if I send this html mail from SWO1 everything is ok, but when the workflow sends it in background there's always an unwanted conversion from charset UTF-8 to iso-8859-1 with changes in background color and font size.

I've tried to set the charset UTF-8 in SCOT but nothing changes and check for OSS notes 661704 , 865885, 887633, 873845, 888518 but these are already installed.

Any help, please? It's urgent.

Thanks and regards.

Angelo