Email Mastery Learning Hub

Lesson 1: What Are Emails? And Their History

Before diving into deliverability and inbox strategies, we need to understand the foundation: What is email, where di...

Lesson 2: How Email Works (SMTP, IMAP, POP3 Explained Simply)

Emails don’t just “fly through the air” when you press send. They rely on a set of rules called protocols that decide...

Lesson 3: Anatomy of an Email

Every email has a structure that makes it understandable by humans and machines. From the subject line you see in you...

Lesson 4: The Role of Email Clients and Servers

When you send or read an email, you’re not just dealing with a simple message—it’s a collaboration between email clie...

Lesson 5: What is Email Deliverability? Why Does It Matter?

Sending an email doesn’t guarantee it will land in the inbox. Email deliverability is about whether your message actu...

Lesson 6: Spam Filters Explained (How Gmail, Outlook, Yahoo Decide Inbox vs Spam)

Every day, billions of emails are sent—but not all of them reach the inbox. Spam filters are the guardians of the inb...

Lesson 7: Reputation & Sender Score (Why ISPs Trust or Block You)

Think of your email sending reputation as your credit score. Just as banks decide whether to trust you with money, Pr...

Lesson 8: What is SPF? (Sender Policy Framework)

SPF (Sender Policy Framework) is one of the most important tools for proving that an email really comes from the serv...

Lesson 9: What is DKIM? (DomainKeys Identified Mail)

DKIM (DomainKeys Identified Mail) is like a digital signature for your emails. It ensures that your email content has...

Lesson 10: What is DMARC? (Domain-based Message Authentication, Reporting, and Conformance)

DMARC is the policy layer built on top of SPF and DKIM. It tells email providers what to do when messages fail authen...

Lesson 11: TLS & Email Encryption Basics

Emails often travel across multiple servers before reaching the inbox. Without encryption, they could be read or modi...

Lesson 12: Best Practices for Email Sending (Frequency, Volume, Warm-up)

Good email content isn’t enough. How you send emails — how often, how many, and how you start — matters just as much ...