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