Another approach i would like to mention is of course to write a letter to send by regular mail or fax.
Advantage of this is that your email is not to be filtered as spam.
And faxes always arrive in my opinion unless the connection is dead but this will show soon enough and doesn't make you wonder if your proposal has arrived yes or no.
If there is a fax number available then i would certainly take my chance with this type of aproach.
Writing business letters is to be taken seriously and more information that i personally have stumbled upon can be found here
http://esl.about.com/cs/onthejobeng..._basbletter.htm
I have another link that i will post soon with tons of example business letters.
Good luck guys
