HTML Email too wide

[GoPats]

My site sends HTML Email... sometimes users complain that the emails are too wide, causing them to have to scroll horizontally. I can't see anything in the HTML that would cause it to do that, and it only happens to some people (I think all are using Outlook).

The only thing that I've noticed is that I have a top-level table:

<table width="100%" ...>

and if I change it to a fixed width, the problem is solved, but then other people complain that the email is too narrow. But 100% should exactly fill the screen, not overfill it, so I don't know why that would be a problem.

Someone else told me to look if there are a lot of nbsp's but I checked and there aren't.

Any ideas?

[Wickham]

I can't test your problem but if 100% width causes a problem, have you tried <table width="750px" as that should be adequate for most people and not be too wide?