JIRA has two MAILER-DAEMON users on my instance

[Adam Jimerson]

For some reason JIRA has created two user accounts on my JIRA OnDemand instance called "MAILER-DAEMON@emx1.uc-1.atlassian.com" and "MAILER-DAEMON@emx2.uc-1.atlassian.com". I don't know why these users were created or what they are for, if these user accounts are not needed would it be safe to remove them?

[Dieter]

I just could imagine you have/had configured a mail handler which creates users automatically from the mail address if there is no user in Jira with the sender's mail address.

if this is true read on else just ignore the answer ;)

Now some bounced notification emails arrived from the mailer daemon (e.g. Because some mails could not be deliverd timely) and the mail handler created these users since it wanted to set them as reporter of the issue - which likely could not be created

i'd say if there aren't any issues associated with these users (reporter), it's safe to delete them

There might be better solutions to avoid that but i created a mail server rule which immediately moves all mails from the mailer daemon to another subfolder which is not scanned by the mail handler