Emailer question using tables

I'm working on a simple mailer with html. I have been reading tables are the way to go and inline styling to be safe.

When I setup my td there is a space between that I can't seem to figure out why its happening.

here is a jsfiddle example : http://jsfiddle.net/rcZZ开发者_StackOverflow中文版b/1/

As you can see there is a white space bettween the header and the banner.If I put another td below that there is a space between that too.

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Try setting line-height:0 on the <td>

jsfiddle