Some of the problems on the Exim-Users mailing list are caused becuase people are using Exim3 documentation with Exim4 Servers. Exim4 was released in 2002. Exim4 replaces Exim3.

Please do not try and use Exim3 documentation with Exim4. All documentation on this site relates to Exim4 unless otherwise stated.

The O'Reilly book is ONLY suitable for Exim3:

http://www.oreilly.com/catalog/exim/index.html    

The UIT Cambridge book is ONLY suitable for Exim4:

http://www.uit.co.uk/exim-book/

If you are not sure which version you are using try running the following commands:

exim -bV

exim3 -bV

exim4 -bV

From the server itself you could also try:

telnet 127.0.0.1 25

quit