Re: [exim] how to quote $header_subject: correctly?

Hello,

V. T. Mueller schrieb:
> an autoresponder router containing:
> subject = Re: $header_subject:
>
> results in delivery failures whenever the subject line contains
> characters like French accents or German Umlauts.
>
> Can someone please tell me how to quote this correctly? I could not find
> a solution reading the docs nor by searching the list archive.

Sorry for posting my own follow-up. I just found the solution after
searching for "encoding" instead of "quoting":

subject = Re: ${rfc2047:$header_subject:}

works fine.

Kind regards,
vt