Hi Michael,
> I got the following error message:
>
> Expansion of "$header_subject" in t_helpdesk transport contains non-printing characters
>
> It looks like a user might have sent a mail with a special character in the
> subject. Is there any way to fix that problem besides removing text = ?
Did you set the "print_topbitchars"-option to true?
A number of MUAs send 8-bit-headers.
Greetings,
Georg
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