Google Strengthens Gmail Security, Blocks Spoofed Emails to Combat Phishing

Google has begun automatically blocking emails sent by bulk senders who do not satisfy tighter spam criteria and authenticating their messages in line with new requirements to strengthen defences against spam and phishing attacks.

As announced in October, users who send more than 5,000 messages per day to Gmail accounts must now configure SPF/DKIM and DMARC email authentication for their domains.

The updated regulations also mandate that bulk email senders refrain from delivering unsolicited or unwanted messages, offer a one-click unsubscribe option, and react to requests to unsubscribe within two working days.

Additionally, spam rates must be kept at 0.3%, and “From” headers cannot act like to be from Gmail. Email delivery issues, such as emails being rejected or automatically directed to recipients’ spam folders, may arise from noncompliance.

“Bulk senders who don’t meet our sender requirements will start getting temporary errors with error codes on a small

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