I often speak to users of Exchange alternative MDaemon who are wondering why they've suddenly started receiving a larger volume of spam than usual. When I take a look at their installations it's not uncommon to find a secondary mail server in place with its own MX record. It's this second delivery path that can be the root cause of the problem and it's not unusual for the customer to be blissfully unaware either, as quite often they're configured by the DNS provider or their ISP automatically.

Some of our most common MDaemon support enquiries we get relate to users receiving spam. Typically the amount of spam has either suddenly increased and there is a flood of junk messages or its just a specific message that looks to be obviously spam but has somehow made its way through. Before picking up the phone to support you might find it useful to follow this simple guide to find out why MDaemon has not treated this message quite as expected.