Learn about DMARC, SPF, and DKIM

July is the point where many email programs discover that their Q3 campaign plan is more ambitious than their sending setup.

The DNS records look familiar. The sending platform says authentication is enabled. The campaign team has an unsubscribe link in the footer. Then a new audience, a new subdo...

Spam complaint rate is no longer a metric to review after a campaign has gone wrong. In 2026, it is an operating limit.

Google's current sender guidance tells senders to keep the spam rate reported in Postmaster Tools below 0.10% and avoid ever reaching 0.30% or higher. Yahoo's bulk-sender req...

An inbox-placement headline can sound reassuring fast.

If a benchmark roundup says the average sender achieved 83% inbox placement, many teams hear: "we should be broadly fine if we are somewhere near that number."

That is usually the wrong takeaway.

Inbox placement benchmarks can be useful,...

One-click unsubscribe is still the requirement that teams most often think they have covered when they actually have not.

That sounds strange at first, because by 2026 this is not new guidance anymore. Gmail and Yahoo have both been clear for a while:

• Gmail bulk senders must support one-clic...

Two years after Gmail and Yahoo raised the floor for bulk senders, the interesting question is no longer whether the rules are real.

They are.

The better question in 2026 is: which parts are still being missed often enough to keep causing spam-folder placement, throttling, rejections, and loss ...

If bulk email compliance work is already underway, one-click unsubscribe is usually where teams discover that a footer link is not the same thing as a provider-recognized unsubscribe flow.

That distinction matters now.

Google's Email sender guidelines require bulk senders to support one-click...

If you send enough mail to Yahoo or AOL users, Yahoo's Complaint Feedback Loop is one of the few signals that tells you, almost directly, when recipients are voting against your mail.

That matters because Yahoo's current sender guidance expects bulk senders to keep complaint rates low, and specifi...