If Google ever decides to take down/rename their non-SSL required SMTP server, or you have a client with an outgoing email server that requires SSL encryption, it isn't too difficult to set up direct emailing in Adagio via Stunnel. There are 3 things to note:

1. Ensure the service is properly defined in stunnel's configuration file. There are examples and premade services for gmail in the default config file. It should be something like:
[whateverservicenameyouwant]
client = yes
accept = (the local IP address of the PC the stunnel service is running on):(the port Adagio is set to send mail through)
connect = (the address or name of the smtp server):(the port it is expecting to send mail through)

2. Change the outgoing server in Adagio's email setup to be the local IP of the machine running the stunnel service and ensure the other options are correct.

3. You may have to experiment a little with some of the extra security options as they are provided in the sample stunnel configuration file, depending on what the mail server you are sending through is 'expecting'.

Happy Wrapping!