I have in confluence V6.6.1 a mail server that does not work and cannot be edited in the mail server section (leads to a NullPointerException at com.atlassian.confluence.admin.actions.mail.EditMailServerAction.doDefault(EditMailServerAction.java:51)).
This mail server cannot be deleted through the administrator functions. When I click on delete nothing happens - no error message, no deletion.
Unfortunately this is the first entry so I suppose that no mails are sent by confluence because confluence takes the first server.
Is there a way to delete this mail server by force? Where is the configuration stored?