OK, so we've started getting errors on our SG330 today, with regards to the spam filter:
The spam filter daemon is unable to reach the database servers via HTTP. Please make sure that the device is able to send HTTP _TCP port 80_ requests to the Internet. You may have to allow such traffic on upstream devices.
Having contacted Sophos, they're aware of the issue and nothing is required from the end user.
Hope this helps anyone who's having a similar problem.
This thread was automatically locked due to age.