On the src.fp.o instance, there is no email server running, so when a user replies to a PR notification via email using the Reply-To header, the email fails. It would be nice to remove the Reply-To header in this case so the user doesn't attempt to use it.
Ref: https://pagure.io/fedora-infrastructure/issue/7082
Metadata Update from @pingou: - Issue tagged with: RFE, easyfix
Metadata Update from @pingou: - Issue assigned to pingou
Commit ec3e6187 fixes this issue