1. Keep daily emails less than 200 a day, below 20 recipients per email.

2. Do not purchase contact/mailing lists.

3. Clean your mailing list regularly.

4. Allow recipients to unsubscribe to your emails.

5. Use fewer than three font types.

6. Optimize your email subject lines.

7. Make sure your email content renders correctly.

8. Stick to consistent branding.

9. Avoid using “no-reply” in the sender's email address.

10. Avoid sending SPAM or unsolicated email at all costs.