1 Carlos -hotmail.com -aol.com -yahoo.com -gmail.com May 2026

If you want to be taken seriously, get off the Big Four. Buy a domain. Use your ISP’s email. Or at least switch to a modern, less-spammed provider.

Because we are watching for 1carlos@ . And we are hitting “deny.” Do you filter out Hotmail, AOL, Yahoo, or Gmail on your forms? Let us know in the comments below. 1 Carlos -hotmail.com -aol.com -yahoo.com -gmail.com

While there is technically nothing wrong with these free, massive providers, a growing number of power users, IT admins, and security professionals are starting to filter them out. Here is why looking at “1 Carlos” (and his generic domain) matters more than you think. Let’s be blunt: Hotmail, AOL, and Yahoo are spam havens. If you want to be taken seriously, get off the Big Four