Symptoms

Email are not being sent from JIRA configured for SMTP. Errors appear such as:

EHLO
501 5.0.0 EHLO requires domain address
HELO
501 5.0.0 HELO requires domain address

Cause

JIRA is not sending the correct parameter to to the outgoing mail server when attempting to send a message. Instead of sending its domain name, it is sending nothing.

Resolution

When you start JIRA, pass it the following parameter:

-Dmail.smtp.localhost=<computer_name>

Substitute the JIRA server name for <computer_name>. See Setting Properties and Options on Startup.