Problem when trying to send emails from Jira

Question

Even when everything outgoing server was configured correctly and is currently registered and active, no email are sent from Jira.

When testing, we get this error:

com.sun.mail.smtp.SMTPAddressFailedException: 504 5.5.2 <localhost>: Helo command rejected: need fully-qualified hostname

But the hostname is correctly configured like n1.domain.com.

We cannot find the place from within Jira where this parameter is configured.

Just to clarify, Jira was installed before the server configuration was finished, so it seems like Java does not recover the correct hostname.

Nic Brough -Adaptavist- · Accepted Answer

If you ping/nslookup n1.domain.comdoes it resolve to the correct email address?

Is the mail server on that set up correctly with it's correct FQDN, or (like the one I messed up yesterday) does it have a similar but incorrect simple host name or one that does not actually match the FQDN?  Try "hostname -f" to see what the server thinks it is called.