Sending and receiving e-mails via gmail should now be supported in build 1644.
You can now specify whether your e-mail provider supports SSL and/or TLS.
For gmail you need to enable TLS for outgoing e-mails and SSL for incoming e-mails.
Gmail settings for outgoing e-mail:
Server: smtp.gmail.com
Port: 587
TLS enabled: ticked
Gmail settings for incoming e-mail:
Server: pop.gmail.com
Port: 995
SSL enabled: ticked