Proposal to Extend Priority Range for Mail Queues

[Maksim Meliashchuk]

Hello everyone!
As a follow-up to
https://issues.apache.org/jira/projects/JAMES/issues/JAMES-3824?filter=allissues
I would like to consider extending the priority range from -9 to 9 to
implement mail queues in accordance with
https://datatracker.ietf.org/doc/rfc6710/
Currently, the Jakarta Messaging API defines ten priority levels, where 0
is the lowest priority and 9 is the highest. Any ideas on how to use
negative priorities? What might a JMS modification or alternative look like?