What are DKIM and Return Path records? Why do I need them?

DKIM (Domain Key Identified Mail) ✉️🔑
DKIM links a domain name with an email. It allows the recipient’s mail server to verify that the sender is authentic.

How DKIM Works ⚙️

1. You send an email from your webmail.

2. Your SMTP server (authorized to send emails for your domain) adds a DKIM signature header and sends it to the recipient’s mail server.

3. The recipient’s server finds the DKIM signature, checks your domain’s public key via DNS 🔍, and validates it.

4. If the signature matches, the email is considered legit ✅.

👉 Note: Mail servers also check other factors when deciding spam scores—like spam trigger words 🚫, weak subject lines, or missing unsubscribe links.

Why use DKIM?
It increases the chances of your emails landing in the Inbox 📥 instead of Spam.

Return Path Address 📧
The Return Path is the email address where servers send bounce reports. If an email fails to deliver, the report goes to the Return Path address (set in the hidden Return-Path header).

For businesses, it’s best to set up a custom Return Path. This way:

• Bounce reports are managed separately 🗂️

• They don’t mix with real customer emails 💬

• Email communication stays organized and reliable ✅