patchbomb: Reply-To support
From RFC 5322:
an optional reply-to field MAY also be included, which contains the field
name "Reply-To" and a comma-separated list of one or more addresses.
[...]
When the "Reply-To:" field is present, it indicates the address(es) to which
the author of the message suggests that replies be sent. In the absence of
the "Reply-To:" field, replies SHOULD by default be sent to the mailbox(es)
specified in the "From:" field unless otherwise specified by the person
composing the reply.
Reply-To addresses may be specified either via command line with --reply-to
or via the 'email' or 'patchbomb' sections of the config file.