What nice that I have to reply in deleted posts...
My personal opinion is that the receiver should understand from the 1st moment why you are contacting him about. Your goal is not to attract as many as you can with a catchy subject/sender name, but not to be missed by those who are interesting in the domain. Also, an unknown surname doesn't say anything.
There is a lot of information in this forum and around the web, however don't expect to make easy money just by copying one tactic. What makes a salesperson good, is the experience.
Maybe something that I didn't make clear before is that most of the times I develop domains, not for selling them as websites, but for raising their value. Even if it sounds weird, a website may hold your sale.
For instanse, if I have one website which is selling pizzas, why would I like to buy another website which is selling pizzas, too? Or why to buy a cooking portal, when I can place my ads there via AdSense or list my compnay? On the other hand, I would pay gold the domain which is coming first in results for the term "pizza" or that has 4000 real facebook fans in my area, and would save me money from advertising.
So in every case, as seller, you have to do an individual research. Check who are the potential buyers, find out what would work and what wouldn't. Should you build a microsite for a period in order to drive traffic to your domain, or a complete site would be better. Does it worth it at all? e.t.c.
There are many factors that you have to consider and MANY MANY things to learn before making your first good sale. Unfortunately I can't share everything, because that would been disrespectful to my customers. However I'm willing to help for the first steps.