Cheers Del,
You are absolutly right!
I'm not sure whether the mail settings section is entirly clear.
Most of the upper boxes mention internal/external mail and ISP mail servers. (Incidently I have just noticed that this is where I change my outgiong ISP mail server address).
The box for setting the POP3 retreival is marked Secondary Server, I had mis read this.
I also had a problem with my ISP providing mail.kmcomputers.co.uk as the mail host. Since installing SME and setting up mu domain name on the server mail.kmcomputers.co.uk has become an internal address. I have contacted my ISP and they have given me the generic mail host for their servers.
By inserting this in the secondary server box I am now collecting external mail and it is being distributed correctly.
Once more,
Many Thanks
Martin