We have multiple mail servers, that share the load of all the incoming email to our systems. If one were to fail, the other(s) would take over transparently - you should see no degradation of your service.

Quite a lot of the sent and received email is actually mis-addressed and spam, a large majority of the sent mail is just messages being sent back, saying "no such address here" etc. A large blank space in the chart, normally means the server was off-line for that period. If the space where the graph is showing "mailstats for ((SERVER NAME))", the server is currently off-line.

The green line signifies the amount of email received, the blue area signifies email sent. All are in average messages per minute. The top set of graphs cover all email sent in the last 24 hours, the last 4 all email in the last month. Click on any graphs to see a larger version. We currently have 4 mail servers active: DNS 1, DNS 2, DNS 3 and Relay.

Day Graphs (Emails over the last 24 hours)
Server: DNS 1	Server: DNS 2
Server: DNS 3	Server: Relay
Month Graphs (Emails over the last month)
Server: DNS 1	Server: DNS 2
Server: DNS 3	Server: Relay