Clifford,

You cannot use the Proxy Server for outbound emails - that can only be used for Inbound.

Besides, even if you were able to use the Proxy Server, the receiving end (gmail.com, yahoo.com or AnyOtherDomain.com) will always see message coming from your IP. I am not sure what you mean by "Transparent Proxy".

You will have to use the regular SMTP server in Xeams for outbound. Xeams also has alerts letting you know if one particular user sends too many outbound emails, which comes in handy if someone on the Internet gets hold of a userid/password and is now misusing a legit account.