Back when I setup our server to use amazon's SES for mail I couldn't get it to work using STARTTLS. Since then they added support but you can still imagine cases where the mail client needs an SSL connection from the beginning. This changeset also allows for setting who the mail comes from in the universe config.
@aswarren I have made the changes discussed in this pull request and committed the result directly to galaxy-central. Let me know if I have messed something up.