When you install Micro Focus TeamWorks, you can choose whether the TeamWorks internal mail host uses TLS (Transport Layer Security) when it communicates with other SMTP mail hosts.
If your TeamWorks site needs to send email messages to an email system that requires secure SMTP (SMTPS), the TeamWorks site must have the same type of root certificate as is required for secure LDAP (LDAPS). If you have not already set up secure LDAP for your TeamWorks site, follow the instructions in LDAP Synchronization Security to set up secure SMTP for communications with your email system.