Tagged: email authentication
Email AuthenticationSPF records tell receiving servers which IPs are authorized to send email from your domain — but they're also one of the most commonly misconfigured DNS records. This guide covers how SPF works, how to set it up correctly, and how to avoid the lookup limit trap that quietly breaks many production setups.
Read article
Email AuthenticationDKIM signs your outgoing emails with a cryptographic key so receiving servers can verify the message is genuine and hasn't been tampered with. This guide explains how DKIM signing works, how to set it up on managed and self-hosted infrastructure, and how to troubleshoot the issues that come up most often.
Read article
Email AuthenticationDMARC is the policy layer that makes SPF and DKIM enforceable — it tells receiving servers what to do when someone tries to spoof your domain. This guide covers how DMARC works, how to set up your DMARC record safely in stages, and how to read the reports that show who is actually sending as your domain.
Read article
Email AuthenticationBIMI lets you display your brand logo in Gmail and Yahoo inboxes next to every email you send. Here's what it requires, how Verified Mark Certificates work, and the exact steps to deploy it.
Read article
Email AuthenticationDMARC generates aggregate reports showing exactly who is sending as your domain and whether authentication is passing. Most senders never read them — but they contain everything you need to advance from monitoring to enforcement safely.
Read article
Email AuthenticationSPF records authorize which IP addresses can send email from your domain — but they break in specific ways that are easy to miss. The 10-lookup limit, duplicate record conflicts, and forgotten sending services are the most common culprits behind SPF failures.
Read article
Email AuthenticationDKIM key rotation limits your exposure if a signing key is ever compromised — but doing it wrong breaks email authentication in transit. This guide covers the safe rotation sequence, including why you must keep the old public key in DNS for 48–72 hours after switching.
Read article
Email AuthenticationBIMI lets you show your company logo directly in the inbox. Here's how the standard works, what you need to set it up, and whether a Verified Mark Certificate is worth the investment.
Read article
DeliverabilityDeliverability problems build quietly before they become crises. This step-by-step audit checklist covers authentication, blocklists, bounce rates, inbox placement, list hygiene, and content — everything you need to find and fix delivery problems before they compound.
Read article