That sounds like a real challenge. You did not indicate what e-mail client you are using. There may have been some defaults set up in your system for spell checking that CAN be changed, depending on your company policy. If you are having issues with this, others might be as well, and they may have come up with a solution — so I would ask around, if you haven’t done so already.

Although it may sound like more steps, you may want to try to compose your e-mail in another program, and use that programs spell check, then copy and paste, and go direct to step 3 — ignore and send.

Proofreading is sufficient if you know how to spell. Spell checking is never sufficient.

Also, grammar counts. For example, “there”, “their” and “they’re” are three different words. Learn the difference. When you make grammatical errors, you come across as uneducated.

5. Use a readable font in a size that is easy to see
6. Avoid stationery that takes a large amount of megabyte

Consider plain text.

14. Answer all questions …

very important

27. Avoid using email to provide “constructive criticism.” It is never taken positively. Those conversations should be done in person.

I disagree that constructive criticism is never taken positively. It would be better to write, “It is not always taken positively.”