Add debug mode selection to the NextGen mail handler

Description

Add option to the NextGen mail handler to run in debug mode.
This mode allows to the admin to see more detailed logs in case of email processing.

Environment

None

Preliminary Test Cases

Turn on debug mode -> debug logs
Turn off debug mode -> no debug log

Assignee

András Németh

Reporter

András Németh

Labels

None

Access to limited visibility issues

None

Product platform

Server
Data Center

Module Dependency

Backup/Restore

Time tracking

2h

Feature Testing Estimate

0.5

Components

Sprint

None

Fix versions

Affects versions

Priority

Major
Configure