Good selling email resources

I got few freelancers who will collect me around 50k emails for companies/individuals who's websites look shitty and who have pretty good background in their work, so I am sure they have budget for website redesigns. I also have phenomenally designed website with portfolio and my previous customers opinions. I have few good clients I am working for as web designer for years so they will gladly share their positive opinions about my work.

Now what I need is good selling email letter, so I will need any resources/samples you guys may suggest me to read. I have already found some advice's and stop words that I should not use inside email to avoid SPAM inbox, but I want to see if any of you have something very useful I could use.

Also if anyone have made any success in this IM field and you have some tips, they are most welcome since I invested some good money and especially time into this, so I hope it will be successful.

thanks for help