Previously if an incoming email had a reply-to header it was ignored and the source
value was used instead to send the email reply. This now uses reply-to if it's present
Remove debug log line about an email sent when no email sent
Fix case matching on recipient email address
If someone created a config YAML with a non lowercased recipient (e.g. FoObAr@tickets.example.com) things would break. This fixes that
sourcevalue was used instead to send the email reply. This now uses reply-to if it's present