I've successfully created a mail merge template and connected it to my simple database that has company name, contact, and email address. AutoCheck shows no errors, and running through the database all the emails look as they should. However, when I send a single email to myself out of the database as a test, the email does not transmit.

I am using Windows Mail (Vista) and have Outlook 2010 installed on my system but haven't used it except for Excel & Word. Is this the problem? Thanks for any help.
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Update: My letter contained two graphics so I was trying to send it HTML. I found that I can transmit from the database as long as the message is sent plain-text. It appears that Outlook 2010 has problems sending HTML. I could use all-text but HTML would be better. I receive HTML transmissions by email all the time - how can I do this? Does it require another email program?