following few tips may help:
1. try to include the "ATTN:to whome ur mailing, FOR:purpose for which the mail is intended..
this format gives your client a clear view that who is trying to make a contact for which purpose...
2. try to be as concise as possible...but beware you are not supposed to skip important details and elements of your message..
3.try to include some photo,or link or such material that instigates an activity....
4.always leave something a bit-unanswered-----so that your client mails you again to get that unsaid piece of information.....like "....apart from these products we are working on some new as well which i will be delighted to discuss with you...." see that...this will create a curiousty...and some charm in furthur coorespondence as well
so cant say how much they help you....but keep trying the good ones points:)....
take care every one around
zeeshan hussain