
Spam Trigger Words: Do They Actually Hurt Deliverability?
Do spam trigger words like ‘free’ or ‘act now’ hurt deliverability? What Gmail, Yahoo, Outlook and SpamAssassin document, and what’s rumor. ...
I run real tests on how algorithms behave and write down what happens: the setup, the results, and what each test can’t tell you. Pick a lane, or start with the latest posts below.
Behind-the-scenes notes from running real experiments.
Small, fast tests with a clear question and a quick answer.
Popular algorithm claims, put on trial.

Do spam trigger words like ‘free’ or ‘act now’ hurt deliverability? What Gmail, Yahoo, Outlook and SpamAssassin document, and what’s rumor. ...

Do Instagram saves help reach more than likes? What Instagram documents about saves, likes and sends, and which creator claims hold up.

Local SEO advice says replying to Google reviews boosts rankings. Here’s what Google actually documents, what’s still a guess, and why you should reply anyway. ...

Some advertisers buy likes and comments to make Meta ads look popular. Here’s what Meta documents about the algorithm, the possible upside, and the risks.

We check 7 popular email open rate myths against published data, and explain what actually gets marketing emails delivered and opened.

Same host, same plan, separate fingerprints. Here’s how I set up hosting for my twin-site SEO test so speed and site networks don’t skew the results.
One short email when a test finishes, with the real numbers, even when the answer is “nothing happened.”