Worldwide Campaign to stop the Abuse and Torture of Mind Control/DEWs
The port Number 25 is for your sending your email while 110 is for receiving your email. Generally speaking, if they are blocked regardless of any reasons, you can't normally send or receive your email. Here is the tool for checking your ports open or not. http://www.yougetsignal.com/tools/open-ports/
Remember, this is basic tool. For more authoritative answers, pls consult computer guy.