Gmail spam and authentication

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Gmail users: Manage spam in Gmail

Gmail automatically identifies suspicious email messages and marks them as spam. Go to your Spam label to see messages marked as spam by you or by Gmail. Sometimes spam messages are sent to your inbox, instead of to the Spam label. Mark these messages as spam to help Gmail automatically mark similar messages as spam.

SPF, DKIM & DMARC authentication—Gmail protects your email by making sure messages you send and receive are authenticated. Unauthenticated messages might be sent to spam. Gmail authenticates messages with SPFDKIM, and DMARC.

Learn how to mark or unmark messages as spam.

Google Workspace admins: Email authentication for Workspace

If you're a Google Workspace administrator, we recommend you set up SPF, DKIM, and DMARC for your organization. These email authentication methods help protect your users and your domain from spam, spoofing, and phishing.

Learn more about SPF, DKIM & DMARC in Help prevent spoofing, phishing, and spam.

Email senders and marketers: Best practices for email sending

If you send email to Gmail users, especially large amounts of mail, we recommend you follow best practices that help ensure your messages are delivered to Gmail's inbox. Follow these best practices to reduce the likelihood that Gmail blocks your messages or marks your messages as spam

Learn how to prevent mail to Gmail users from being blocked or sent to spam.

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