mdaemon ssl or tls settings.

Hi,

I,m currently trying to figure out weather my encrypted mail channel uses tls or ssl for port 587. Funny enough some clients are having difficulties mailing via contact form ( plugin wordpress) as it seems that suddenly the tls function does no longer work, or perhaps they have changed the plugin. However I would like Mdaemon to enable both protocols. Currently only ssl seems to be working on port 587. ?

Where can I set this ?

I,m running mdaemon 16.5.1