Blog.

Articles and tutorials on communication infrastructure.

Authentication(4)Deliverability(8)Identity(1)Infrastructure(5)Protocols(5)Regulation & Governance(1)Security(2)Strategy(4)User Experience(1)

13–15 of 15 articles

The Hidden Cost of Shared IP Pools (And When to Move to Dedicated)

When to move from shared to dedicated IP pools. The volume threshold, reputation contamination risks, and the cost-benefit analysis ESPs don't want you to do.

DavidMay 9, 2023

Protocols Authentication

Understanding DMARC Policies: From p=none to p=reject Without Breaking Things

How to move from DMARC p=none to p=reject without breaking production mail. The phased rollout that actually works with the failures most senders hit.

DavidApr 18, 2023

SPF Records Demystified: Why Your "v=spf1" Setup Is Probably Wrong

Most SPF records are subtly broken. The 10-lookup limit, multiple records, +all, and the alignment trap what's actually wrong with your SPF setup.

DavidFeb 14, 2023