A lot of users never bother to set this up, and I am the worst offender. But this is really a good idea; set up your e-mail to spell check itself before going out. Sure, it takes a little while to "set up" (i.e. teaching it to recognize words it think are misspelled, but actually aren't).
1. Select Tools | Options | E-mail | More Options | Advanced
2. Check the box labeled "Auto spell check before sending".
Now, when sending GoldMine e-mails, you will get the Check Spelling window.
You will need to "Add" any words that constant appear in your industry, or you can choose to "Ignore" them. The main idea is that once the dictionary has been added to after awhile, Spell Checking becomes more less painless and pretty much takes care of itself. Try it!