Spelling and grammar mistakes can be embarrassing. So, as you compose an email, it’s a good idea to check for spelling errors. Fortunately, Outlook is helpful in identifying spelling and grammar errors in your messages. By default, Outlook checks for spelling and grammar errors as you type, underlining misspelled words in red and double-underlining grammar errors in blue.
Outlook recognizes several common errors and will use AutoCorrect to automatically fix them for you. For example, AutoCorrect will automatically change the misspelling “teh” to “the.”
Just type—AutoCorrect will fix common typos after you press the spacebar.
Sometimes a word that is spelled correctly will be flagged as an error. This is common with last names and company names. When this happens, you can tell Outlook to ignore the error.
If you frequently see a correctly spelled word that is flagged as an error, you might want to consider adding it to the Dictionary so it won’t be flagged in the future.
Always check spelling before sending toggles whether a spellcheck is automatically performed before sending an email.
Ignore original message text in a reply or forward toggles whether the original text in a replied-to or forwarded email is also checked for spelling and grammar.
You can also click the Spelling and Autocorrect button to access more proofing options, including whether to skip words in uppercase or those containing numbers.