In 2023, cybersecurity researchers and threat intelligence platforms observed an uptick in the circulation of plaintext (.txt) files containing millions of email addresses and, in some cases, passwords or usernames linked to Yahoo, Gmail, and Hotmail (now Outlook). These files often surface on hacking forums, Telegram channels, or public data leak repositories.
In 2023, start with p=none (monitoring only), then after one week change to p=quarantine (send suspicious mail to spam), and finally p=reject (block unauthenticated email). Google and Microsoft now look for p=reject for high-volume senders. yahoocom gmailcom hotmailcom txt 2023
Log into your domain registrar (GoDaddy, Namecheap, Cloudflare, Google Domains, etc.) and locate DNS Records or Zone File Editor. Google and Microsoft now look for p=reject for
The keyword yahoocom gmailcom hotmailcom txt 2023 may seem dated soon, but the principles will endure. If you were managing email servers before February
If you were managing email servers before February 2024 (the enforcement date for rules announced in late 2023), you might have gotten away with sloppy configurations. Not anymore.
In October 2023, Google and Yahoo jointly announced new requirements for bulk senders (those sending over 5,000 emails per day to Gmail or Yahoo addresses). Microsoft followed with similar guidelines for Outlook/Hotmail.