SPF, DKIM, and DMARC Explained: How They Work Together
Want SPF, DKIM, and DMARC explained without the vendor sales pitch? Each protocol solves part of email spoofing. Here is what they do, how they work together, and what to set up first.
email-deliverability
What Is a DNS Blacklist? (And How to Get Off One)
Need to remove your IP from an email blacklist? Spamhaus, Barracuda, and SpamCop each have different processes. Here is what a DNS blacklist actually is, why SORBS no longer matters, and the steps that work.
How to Set Up SPF and DMARC Without Breaking Email
Need to set up SPF and DMARC without breaking email delivery? The safe order matters more than the records themselves. Here is the staged playbook — inventory senders first, publish in order, monitor before enforcing.
What Is Reverse DNS? PTR Records and Email Deliverability
Wondering what reverse DNS is and why your emails are bouncing? PTR records and FCrDNS now decide whether Gmail, Outlook, and Yahoo accept your mail. Here is what changed in 2024-2025 and how to fix it.