How do I prevent Black Friday emails from going to spam?

As an e-commerce marketer preparing for Black Friday, I'm deeply concerned about my promotional emails potentially being flagged as spam. I've invested significant time and resources into crafting compelling Black Friday campaigns, but if these emails don't reach customers' primary inboxes, my entire marketing strategy could be compromised. I need a comprehensive approach to ensure high deliverability, maintain sender reputation, and maximize the chances of my Black Friday email marketing success.