When customizing your view press Other Settings and set the grid line style.
Additionally see http://www.howto-outlook.com/faq/classicview2003.htm

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Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more

http://www.msoutlook.info/
Real World Questions, Real World Answers

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"Alan Rogers" Alan wrote in message
...
Is there a way to remove the lines between each message within the summary
pane (Inbox, Deleted, Sent...etc)? I find the lines are hard on my eyes.
I
feel as if I am looking at an Excel spreadsheet.