how to build a mail exchange server on ubuntu server

[nnamdi]

hello everyone, in my company we have mail server which is web based but we want to build an in house mail server to have all mails on it instead of it being online, and also to be able to send mails locally on the network "inbound" and also to other mails"outbound"... any clues and cost implications too thabk you in advance

[YesWeCan]

Citadel perhaps? http://www.citadel.org/doku.php

[nnamdi]

okay thank you let me loook at it closely okay.. please any other clue would be fine by me...

[YesWeCan]

Postfix is commonly used. Again, free but a little fiddly. Some interface it to Dovecot and Fetchmail. Just Google these names.

For a professional "exchange" style server have a look at Zimbra: http://www.zimbra.com/products/