email and Linux / #5653

Sorry to come back to this one,
I am pulling my hair on getting the email working under a Ubuntu LAMP server. Webmin is in place and is sending emails properly.
I have been to all .ini .conf you want, apply the smtp patch etc ....
nothing .....
When I submit to change my password it says edouard@192.168.1.8 and system info says that smtp is localhost. I am pretty sure that the answer is in my reach, but where the heck do I change the SMTP server.
Thanks a lot, that would help heaps....