Various error messages in the system will normally be issued as internal email. To ensure that these will actually be read, one should create an /etc/aliases. Remember the command newaliases every time you change this. An example that should cover most eventualities is:
Many programs for Linux may be found at Sunsite, which is usually quite busy. But there are many mirrors and every time there is a reference to ftp://sunsite.unc.edu/pub/Linux/.. one should try to use a mirror close to home, e.g. ftp://ftp.nvg.unit.no/pub/linux/sunsite/...
If you happen to be migrating from Yarn it should be possible to convert these to standard folders using the yarn2mf available at: