Three issues:

1) Processing of bounce emails using the odoo-mailgate.py script logs that it's not a bounce email

2) Delivering bounce emails to 'bounce' alias creates discussions but doesn't update 'bounce' data in Email Marketing

Issue detail

1) Processing of bounce emails using the odoo-mailgate.py script logs that it's not a bounce email

I see I see 'IndexError: list index out of range' is my log files for line 1343 of _message_parse_extractr_bounce.  This looks for a 'Final-Recipient' header but the remote MTA is (incorrectly) creating 'Final-recipient' (note the difference in case)  To my inexpert eye, it seems that 'for h in message.get_all(header, []) if h' (in decode_message_header) is failing.

My DSN is:

Content-Type: message/delivery-status; charset=UTF-8;
Content-Transfer-Encoding: 8bit

Reporting-MTA: dns; cm2nec [10.103.251.2]
Received-From-MTA: dns; my.server.goes.here [IP.ADDRESS.GOES.HERE]
Arrival-Date: Fri, 23 Oct 2020 23:09:54 +0100


Final-recipient: rfc822; email@example.com
Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to reach does not exist. Please try

Last-attempt-Date: Fri, 23 Oct 2020 23:09:54 +0100

2) Delivering bounce emails to 'bounce' alias creates discussions but doesn't update 'bounce' data in Email Marketing

Does anybody know why this is happening ? 

For my 'bounce' alias, I have 'Actions to Perform on Incoming Mails' set to 'Mass Mailing'