Further to my posting here: Why does my CMS run extremely slow in my workstation (Ubuntu) I now ask "Do I need Nullmailer-Send" running? The reason I ask, is that earlier this year (2013) I had issues regarding large .log files being created in /var/log which result in some .logs being some 1GB and I had to manually delete them. My machine (a Ubuntu 12.10 and very nice it is too!) is only a home office 'desktop' work-station and used for the normal daily things (inc LAMP WebDev) but mainly Office, Web-browsing, FTP and I don't use it as a server, as my email is collected either by Evolution Client or via GoogleMail.com.
I would like to reduce any system 'bloat' and hence my OP here about Nullmailer.