✉️ Email Deliverability
Email authentication is the difference between the inbox and the spam folder. Work through the records that prove your mail is legitimate, checking each against real DNS as you learn.
- 1
Start with SPF
What an SPF record is and how receivers use it. Check a domain's SPF via its DNS TXT records.
📖 Read: What Is an SPF Record? · 4 min
🔧 Practice: - 2
SPF, DKIM & DMARC together
How the three records combine to authenticate mail and stop spoofing.
📖 Read: SPF, DKIM and DMARC Explained · 5 min
- 3
Set up DMARC
Build a DMARC policy the right way, from monitoring to enforcement.
📖 Read: How to Set Up DMARC · 4 min
- 4
Why mail lands in spam
The common reasons messages get filtered — and how to fix them. Validate an address and its domain.
📖 Read: Why Is My Email Going to Spam? · 4 min
🔧 Practice: - 5
Read the headers
Email headers hold the whole delivery story. Learn to read the path a message took.
📖 Read: How to Read Email Headers · 4 min