Antispam Options

Enable Antispam

Activates POPcon’s built-in antispam filtering. When enabled, incoming emails are checked against DNS blacklists and user-defined rules before delivery to Exchange.

DNS Blacklist Servers

Configure one or more DNS-based blacklist (DNSBL) servers to check the sending mail server’s IP address against known spam sources.

• Add: Add a new DNSBL server address to the list.
• Edit: Modify an existing DNSBL server entry.
• Remove: Delete a DNSBL server from the list.

User-defined Whitelist

Define rules to always allow emails matching specific criteria, bypassing spam checks. Whitelist entries can match on:

• Sender address: The From: header address
• Recipient address: The To: or CC: header address
• Subject: Text contained in the Subject: header
• Attachment name: Filename of an attached file
• Header field: Any custom header field and value
• Mail text: Text contained in the email body

User-defined Blacklist

Define rules to always flag emails matching specific criteria as spam. Blacklist entries can match on the same criteria as the whitelist:

• Sender address: The From: header address
• Recipient address: The To: or CC: header address
• Subject: Text contained in the Subject: header
• Attachment name: Filename of an attached file
• Header field: Any custom header field and value
• Mail text: Text contained in the email body

Action for Spam

Configure what happens when an email is identified as spam:

• Divert to email address: Redirect the spam email to a specified mailbox for review instead of delivering it to the intended recipient.
• Tag subject with [SPAM]: Prepend [SPAM] to the email’s subject line and deliver it normally. Recipients can then use mail client rules to filter tagged messages.