If you have DMARC and DKIM configured correctly, use a dedicated IP (so you can control its reputation) which you don't just start sending millions of emails fr

If you have DMARC and DKIM configured correctly, use a dedicated IP (so you can control its reputation) which you don't just start sending millions of emails from and have your SMTP server configured to communicate via TLS/SSL, you'll probably be fine -- assuming your IP hasn't been blacklisted in the past.