When you install Kablink Vibe, you can choose whether or not the Vibe internal mail host uses TLS (Transport Layer Security) when it communicates with other SMTP mail hosts. For more information, see Inbound Email Security
in Basic Installation
in the Kablink Vibe 4 Installation Guide.
If your Vibe site needs to send email messages to an email system that requires secure SMTP (SMTPS), the Vibe 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 Vibe site, follow the instructions in Section 31.1, Securing LDAP Synchronization to set up secure SMTP for communications with your email system.