You can customize the level of SPF/ DKIM filtering from the Spam Control section in the control panel. In case there are SPF/ DKIM failures, such emails are classified as Spam and considered as spoofed emails generated from suspicious sources. The incoming emails are validated for SPF and DKIM records and are also analyzed for DMARC policy based on the domain settings. The organization's Blocked List defined by the administrator, the individual Blocklists created by individual users is also used for Spam filtering. Organization Blocked List and user-level blocklists:Īpart from the custom Blocklists, the IP Addresses and domains are also checked against our exhaustive lists, at various levels. In case IP Addresses/domains/email addresses are found to be listed in any of the popular Blocklists, such incoming emails are blocked and bounced back. The incoming IP Address/ Domains/ Email addresses are processed against different blocked lists. Apart from the built-in Spam filters, the organization administrators can control the spam settings, add emails and domains to Blocked List and Allowed List, monitor using quarantine, or bounce back emails based on various rules and email policies.

Zoho Mail automatically scans all the incoming emails for Spam based on various parameters. Outgoing emails - Better deliverability.Organization Blocked List and User level blocklist.

Zoho invoices go to spam folder