Google Cracks Down on Spam With New Rules for Bulk Email Senders

Google will enforce new requirements on bulk email senders by February 2024 to reduce Gmail spam. Senders must keep spam below 0.3%.
Bulk senders must let users unsubscribe from emails with one click within 2 days.
Bulk senders will be required to authenticate emails to close security loopholes used by attackers.
Google aims to improve email security by validating senders are who they claim to be.
Google has added other verification steps for Gmail, like for adding forwarding addresses and editing filters.

theverge.com

Relevant topic timeline:

10/3/2023

Google and Yahoo Announce New Anti-Spam Measures to Protect Email Users from Unwanted Messages

Google is implementing new inbox protection measures, including email authentication and a one-click unsubscribe option, to prevent Gmail users from receiving unwanted spam messages. These measures will also be implemented by Yahoo in the near future.

10/4/2023

Gmail Cracks Down on Spam with New Unsubscribe Rule and Ongoing Security Efforts

Gmail will soon require bulk email senders to include a single-button opt-out option, while also implementing a blue verification checkmark system, in an effort to reduce spam and protect users from unwanted messages.

10/8/2023

Microsoft Warns Office 365 Users to Authenticate Emails or Risk Being Marked as Spam by Gmail

Microsoft has warned users of its 365 email service to authenticate outbound messages in response to Google's stricter anti-spam rules for bulk senders, emphasizing the importance of maintaining deliverability and reputation when sending large volume emails.