Is anyone using hobbit to monitor smtps (secure smtp) ?

I am unable to get hobbit to use STARTTLS as I get this error message: Unspecified SSL error in SSL_connect to smtp (6400/tcp) on host xxx.xxx.xxx.xx: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol

bb-hosts looks like this:

xxx.xxx.xxx.xxx hostname # smtps

and bb-services looks like this:

[smtps] send "mail\r\nquit\r\n" expect "220" options ssl,banner

No default port-number assignment for smtps - nonstandard according

to IANA port 25

any idea ?