SMTP Connection troubleshooting

Make sure that:

SMTP server specified in Sage CRM is up and running.
SMTP port specified in Sage CRM is open and accepts connections. For example, the port may be blocked by a firewall or antivirus.

For instructions on how to specify SMTP server and port in Sage CRM, see Configuring standard email.

The System Health feature doesn't check if the SMTP server user name and password are correct.