Spam settings
- Enhance security for forged spam (DMARC)
- Email whitelists and blacklists
- Whitelist IP addresses in Gmail
- Customize spam filter settings
- Bulk Senders Guidelines
- Block specific senders based on email address or domain
- Set up an inbound mail gateway
- Check if your Gmail message is authenticated
- Configure options for non-Gmail mailbox users
- Set up and manage email quarantines
- Use enhanced pre-delivery message scanning
- Using address lists in Gmail settings
- An email I expected was marked as spam