Just upgraded from JIRA 4.3.4 to 5.0.2. Sandbox installation worked with no issues. Production installation is refusing to send emails. Error message: "AuthenticationFailedException: No authentication mechansims supported by both server and client"
This server has two JIRA installations. The second is still v4.3.4 The same setting work ok on the second installation but not on the new 5.0.2 installation.
Any help would be gratefully received.
Thanks a million,
David