[JAMES-3295] Integration tests : SMTP out - retry back off leveraging MailRepositrories and reprocessing

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.6.0
• Component/s: Queue, rabbitmq, Remote Delivery, tests
• Assignee: Unassigned
• Reporter: Benoit Tellier
• Created: 06/Jul/20 02:53
• Updated: 15/Jul/20 04:38
• Resolved: 10/Jul/20 08:29

Description

Context

Distributed James do not support MailQueue delays making it unusable as a MX server.

However given a fixed network of suppliers to work with, delays are not an issues, SMTP error just need to be correctly handled.

retrying without delay could enhance the situation by working around some transient remote server errors. It’s better than not retrying at all (or doing all the retries without delays).

Given manual intervention, it is possible to correctly

Requirements

Such a solution should:

• Attempt delivery a single time
• Store transient and permanent failure in different mail repository
• After a given number of tries, transient failures should be considered permanent

Definition of done

Write potentially failing mailet integration tests demonstrating the above proposed RemoteDelivery error handling.