The outbound mail service of Service Desk is not working properly. When the notifications fail, the following error is captured in the NX_ROOT\mail_nxd.log log file:
ERROR [mailNxdActorSystem-akka.actor.default-dispatcher-27292] c.c.S.m.c.JavaMailSMTPClient - The transport is not connected or is dead. Reason: {} com.sun.mail.util.MailConnectException: Couldn't connect to host, port: SERVERNAME, PORT; timeout -1
CA Service Desk 17.x
All Supported Operating Systems
Ensure that the communication between the Service Desk server and the Mail server does not have anything that blocks it. Refer to the following link for the minimum port requirements that need to be open:
Supported Ports and Port Ranges
Refer to the ports listed for SMTP, POP3 and IMAP