A great tool I use whenever I e-mail reporters is SpamCheck.  It's a free service that allows you to paste your e-mail address, subject line and the body of your e-mail into the "SpamCheck Form."  Click "submit" and it will give you a "Total Spam Score" and tips for improving your score and staying out of the junk e-mail folder.

You can use SpamCheck for e-newsletters, market updates, follow up e-mails... any electronic communication with your customers.

It's quick, easy... and did I mention it's free?  I added it to my toolbar in Internet Explorer so it's always front and center on my home page.

Before hitting send on an e-mail to your customers (and reporters!), visit http://www.spamcheck.sitesell.com/ and make sure your message actually makes it into their Inbox.