yes,..the cyber sleuths can trace location of the PC you used to send mail via the IP address. Thats how terror mails are traced, although its quite an effort for the cyber cops.
well, if you use a cyber cafe to send your mails,it may only be a lil more difficult.
But then, you remember the info & an alternate email id you furnished while registering for your gmail Id ? Thats another trail you left behind.