Receiving this message on SM17 Inbound Gateway:

[24422003] ClamD Checks error: No connection could be made because the target machine actively refused it 127.0.0.1:3310 | error
10:43:29.666 [24422003] Spam Checks started.
10:43:29.666 [24422003] Spam Checks skipped: User authenticated
10:43:29.666 [24422003] Spam Checks completed.
10:43:29.666 [24422003] Removed from SpamCheckQueue (1 queued or processing)
10:43:29.674 [24422002] ClamD Checks error: No connection could be made because the target machine actively refused it 127.0.0.1:3310 | error
10:43:29.674 [24422002] Spam Checks started.

What do I need to set up or change on this machine?

( Thanks in advance)