by Francis Rozange | Sep 8, 2026 | Emailing
For eleven years DMARC was an informational document. Published in March 2015 as RFC 7489, it had not even gone through the IETF’s standards process: it arrived through the independent submission stream, with Informational status. In other words, the mechanism...
by Francis Rozange | Sep 8, 2026 | Emailing
On 2 April 2025, Microsoft announced that domains sending more than five thousand messages a day to Outlook.com and Hotmail would have to authenticate their mail. SPF, DKIM, DMARC at p=none minimum, aligned on one of the two. Enforcement on 5 May. On 29 April, six...
by Francis Rozange | Sep 8, 2026 | Emailing
Google publishes a threshold: five thousand messages a day. Microsoft publishes the same. Yahoo, asked about its own, answers this: “A ‘bulk’ sender is classified as an email sender sending a significant volume of mail. We will not specify a volume...
by Francis Rozange | Sep 8, 2026 | Emailing
Of the dozens of measurements a campaign produces, exactly one decides your future at Gmail. It is not the open, nor the click, nor the bounce. It is the proportion of recipients who clicked “Report spam”. Google publishes two values for that proportion,...
by Francis Rozange | Sep 8, 2026 | Emailing
There is an invisible border in email. On one side, an ordinary sender nobody looks at. On the other, a bulk sender, subject to rules that are written down, measured, and lately enforced. That border carries a number: five thousand. Most companies cross it without...