hmmm... well then, try to stop using Word as your email editor:
In Outlook, Click on the Tools menu, the Options item, and then click on the Mail Format tab. Now, make sure that both the check boxes that reference Microsoft Word are UNchecked. You’ll still be able to send and receive HTML and Rich Text email, but Outlook will use it’s own, faster and more lightweight editor instead of Word.
or
use plain text messages, and stop sending HTML and Rich Text mail completely:
In Outlook, Click on the Tools menu, the Options item, and then click on the Mail Format tab. Make sure that the drop-down next to Compose in this message format: is set to Plain Text.
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If these suggestions still didn't help you, please provide us screenshots of:
- "Mail Format" tab settings
- example of one "email with small letters"