9sBlog

Marcus Reed

Marcus began as a systems administrator before moving into cybersecurity at a managed-security and web-hosting company, and then into tech writing. He handles security, privacy and browsers at 9sBlog — Chrome and Edge, passwords and accounts, tracking, DNS, and staying safe without the scare tactics.

50 articles

A person working at an office desk
Software

How to Block Someone on Gmail

Stop a sender's emails in Gmail: open a message, hit the three-dot menu, and Block. Here's how, how to unblock, and how to block a whole domain.

3 min read
A laptop on a desk showing a website in a browser
Hosting

Why Does My Website Say Not Secure?

The 'Not secure' warning means your site has no valid HTTPS certificate. Here is what it means, how owners fix it, and what visitors should do about it.

3 min read
A student typing at a keyboard
Software

How to Unsend an Email in Gmail

Sent a Gmail message too soon? Click Undo in the seconds after sending, and set a longer window — up to 30 seconds — so you always get the chance.

3 min read
A laptop open on a desk showing a web browser
Software

How to Update Google Chrome

Keep Chrome current for speed and security. Here is how to update it on desktop and phone, and how to read the colored Update dot in the menu.

3 min read