Explanation SPAM statistics
Since the beginning of June 2007, the IT Center has been using two identical appliances from Ironport (now subordinate to Cisco) as spam filters, virus filters and spam detection for the entire university.
Thanks to these systems, more than 82 percent of spam emails are either not accepted at all or marked after acceptance, which significantly reduces the load on the university's mail servers and users' mailboxes.
The remaining emails, which are accepted by the systems and forwarded to users, may have virulent attachments removed and - if they are spam - are marked as such by adding *****SPAM***** / etc. in the subject line.
Currently, more than 77.5 percent of such delivery attempts can be rejected directly, as the emails were sent from mail servers with a poor “reputation”.
A further 1.2 percent of emails are not even accepted due to invalid sender or recipient addresses.
In the navigation bar on the left, you can view spam and virus filter statistics sorted by year and month.
Additional Information: