Deliverability

In November 2009 the security company FireEye knocked the Mega-D botnet (also called Ozdok) offline, but the win was short. Mega-D was sending more…

People opt out, or hit “report spam”, when they can’t tell who an email is from or why it reached them. In November 2026…

Images are fine in email as long as the message still works without them. Put your headline, offer and call to action in live…

McAfee‘s S.P.A.M. experiment ran in April 2008. Fifty volunteers in 10 countries answered every spam message and pop-up for 30 days, and between them…

Your email delivery rate is the share of sent messages that the receiving mail servers accepted: emails sent minus bounces, divided by emails sent.…

“Triple opt-in” isn’t a real standard. It’s a nickname for what happens when a sender runs its double opt-in flow a second time after…

Double opt-in still works in November 2026: a subscriber’s address only joins your list after they click a link in a confirmation email. That…

No. Goodmail Systems shut down its CertifiedEmail service in February 2011, so you can’t buy “email postage” from it any more. In November 2026,…

Every email platform still reports an open rate. As of November 2026, though, it counts how many times a tracking pixel loaded, which is…

To improve deliverability in November 2026, start with authentication. Your sending domain needs SPF, DKIM and a DMARC record that aligns with your visible…