Inbound Allow/Block

You can create a list of email domains and addresses that you trust or don't trust.

Restriction This option is only available if your license includes Sophos Email.

A list of domains and addresses that are allowed to connect with your email system, or are blocked from it, helps you to control spam. This setting only applies to inbound messages.

You can block or allow entire domain names, IP addresses, or specific email addresses. The domain or email address is added to the list and shown as either allowed or blocked. This list is global and applies to all protected mailboxes.

Wildcards are supported for email addresses and domains. For example, *@domain.com would include any addresses that are part of domain.com. Subnet masks are supported from /16 to /32 (inclusive).

You can also use wildcards to block whole top level domains (TLDs). For example, *.top would block every email from the .top TLD. This is useful for blocking email from generic or geographic TLDs that you do not communicate with, and are common sources of spam.

If you add the same address or domain to both the allow and block lists, select Override duplicates to ensure your most recent choice is used.

You can view email domains and addresses that you have already blocked, including IPs that you have blocked, through the Message History and Quarantined Messages settings.

Go to Settings > Inbound Allow/Block to do as follows:

  • Add an allowed domain or address.
  • Add a blocked domain or address.
  • Import a list of domains to block or allow.
  • Delete a domain or address.