I am using Jira Service Desk 3.15.3 and Email This Issue 7.1.2 addon. Incoming mails are processed by Jira mail server (system > incoming mail ...) and Email This Issue Mail Handler. Problem is when customer replies to notification, comment is not added. At the same time under Emails section in the ticket I see, that customer has commented this issue by email. What can cause that comment is no added?
Cheers,
Andrus Voolaine