I hope I can get some help on this:

I have been sending out an email to about 200 people every month and a few
of them don't seem to work correctly. Sometimes the fields will be displayed
in the email or some information from a previous mail merge (using mostly the
same documents). For example,

First Last
Joe Schmo

or

Jill Doe
Joe Schmo

When I look at the sent email in outlook, the email looks perfect, but
somehow a couple of emails every month are getting some wrong information. I
suspect that some email systems are stripping down the message somehow or
something like that. Any help at all is appreciated