Incorrect encoding for utf-8 characters in reply-to addresses #147
Description
Most e-mail headers got proper character encoding handling with PR #132. Unfortunately that change missed that the reply-to header was not treated as an address but as a regular header. As a result it did not get the same kind of handling as the from, to, cc and bcc headers.
As a result reply-to addresses get currently incorrectly encoded if they contain utf-8 characters.