Hoe can i in sendmail allow any user like so i do not need everytime re-build the access db ? is it possible?
I am not sure I understand your question. Can you provide details regarding your environment and which database you are having to rebuild? If you are talking about a simple mail server, then any users can already send email without major modifications. The only change that would need to be made is the "myorigin" value in the /etc/postfix/main.cf (assuming you are using postfix). EDIT: I just realized you meant for incoming mails and not outgoing. This makes much more sense. I think what you are looking for is a catchall email address. You can find details on configuring this at http://www.cyberciti.biz/faq/howto-setup-postfix-catch-all-email-accounts/