Category
Deliverability
Zeqo guides in the Deliverability category, organized for faster browsing.
DMARC Policy: When to Use p=none, quarantine, or reject
A DMARC record at p=none monitors but protects nothing. Here's when to move to quarantine or reject without breaking your own email.
Transactional Email Deliverability: Keep Password Resets and Receipts Out of Spam
Password resets, receipts, and product alerts cannot wait in spam. A practical deliverability checklist for transactional email.
SPF Record Syntax Explained: Includes, IPs, and the 10-Lookup Limit
SPF looks like one TXT record, but includes, redirects, and the 10-lookup limit can quietly break all your mail. Here's how to read it correctly.
What Is a DKIM Selector? (And Why “DKIM Missing” Is Often Wrong)
Half the “your DKIM is missing” warnings are false alarms. The reason is the selector — what it is, where it lives, and how to check yours correctly.
How to Set Up SPF, DKIM & DMARC for Google Workspace (Step by Step)
New on Google Workspace? Here's the exact, copy-paste setup for SPF, DKIM, and DMARC — plus how to confirm all three actually pass.
Email Warm-Up: How to Build Sender Reputation Without Hitting Spam
Send 500 emails from a brand-new domain and you look exactly like a spammer. How to warm up the right way — and the ramp schedule to follow.
DMARC Reports Explained: How to Read Them and Fix What They Reveal
Set up DMARC and the reports start rolling in — as unreadable XML. What they actually tell you, and how to use them to lock down your domain.
SPF, DKIM & DMARC Explained: A Plain-English Guide for Founders
The three DNS records that decide whether your email lands in the inbox — explained without the jargon, plus how to check yours in 30 seconds.
Why Your Cold Emails Land in Spam (and How to Fix It)
Authentication is only half the battle. The real reasons outreach gets filtered — and a checklist to land in the inbox instead.
How to Check if Your Domain Is Blacklisted (and Get Delisted Fast)
A blacklisting can block your email overnight — without any warning. How to find out if you're listed, get removed fast, and avoid it happening again.
Google & Yahoo Sender Requirements: The Checklist Every Sender Needs
Since 2024, Gmail and Yahoo enforce real rules for senders — miss them and your mail gets rejected. The complete checklist, explained simply.