Hi,
I've got the problem with jira 5.1. Very often it doesn't create issues via email.
The following errors are in the log file:
2013-08-28 10:13:36,494 QuartzWorker-1 WARN ServiceRunner PBKAN Activity [atlassian.mail.incoming.mailfetcherservice] PBKAN Activity[10120]: Sender is anonymous, no default reporter specified and creating users is set to false (or external user management is enabled). Message rejected.
2013-08-28 10:13:36,494 QuartzWorker-1 INFO ServiceRunner PBKAN Activity [atlassian.mail.incoming.mailfetcherservice] The message has been rejected: Sender is anonymous, no default reporter specified and creating users is set to false (or external user management is enabled). Message rejected.
Best regards,
Irina