On Thu, 12 Aug 2010, Steve Atkins wrote: > > > The growth of sending per-recipient tailored messages seemed to be > > the cause. > > Only in higher-end mailing list managers.
A significant number of my users send per-recipient customized mailshots to alumni using a Microsoft Office mailmerge facility. The mean number of recipients we get on mail to our MXs is 1.1. The overall number (for both internal and external mail) is higher, about 1.3, because of multi-recipient message submission and because of our internal mailing list server. This mean is much lower at the moment than it is during term. Here's a historical graph which shows the proportion has not changed very much over the last several years. MsgIn and MsgOut count accepted and delivered messages respectively. XRcpt counts additional deliveries, i.e. it's the 0.3 part of the 1.3 mean above. The lump in 2007-2008 is due to poor spam filtering. http://canvas.csi.cam.ac.uk/stats/ppsw/img/rawtraffic.2160days.gif Tony. -- f.anthony.n.finch <[email protected]> http://dotat.at/ MALIN HEBRIDES: NORTHWESTERLY, BACKING SOUTHWESTERLY FOR A TIME, 4 OR 5, OCCASIONALLY 6 AT FIRST IN SOUTHEAST MALIN. SLIGHT OR MODERATE. RAIN LATER. GOOD, OCCASIONALLY MODERATE.
