NOTE: Here is what I am looking at: http://us6.samba.org/samba/docs/Samba-HOWTO-Collection.html#WINBIND Right now I am looking at using winbind to authenticate users for our email servers. Currently here is how we are setup: Postfix Individual user logins for each user who receives email POP3 for Outlook to receive email from the server As it is right now for each user we have to create a login/password for the email server, and then go to the Windows 2000 Server in Active Directory and create another user/password. End users do not usually know the password since it is different then their network login. Our goal is to use the Windows 2000 Active Directory to authenticate the end users for email, and also to create one account on the AD server that will show up automatically on the Linux box so that Postfix will receive any emails sent to their username@domain.com. If setup properly then we would only have to setup a user in Active Directory, then the email server (using winbind) would now know that user exists and accept email for them. Plus when the user has to authenticate to receive email it would use the stored information from AD, also if the end user changes passwords then the email server will know about this. None of the users need a shell account, and currently none of them have one setup. So my questions to the masses: 1. Is anyone using winbind to authenticate for email like this? Are you using postfix? Any horror/war stories to tell ?? 2. What kind of success are you seeing? Is the email server dropping anything email wise? (I have this fear that the email server might occasionally drop emails if winbind loses contact with the AD server) 3. We have more then one AD domain, can winbind handle more then one domain? Only 1 email server in this case. 4. How often does winbind update changes from AD ? For example lets say someone changes their password, will winbind know immediately or will it take awhile? What if we delete a user in AD? 5. Does anyone have any other ideas on how to accomplish this goal? (NOTE: we tried the AD4nix project and it does not work properly, also lacks decent user support) (Side Note-) The Overall end goal is to find a decent solution comparable to Microsoft Exchange using Outlook. Preferable something that is free and we do not have to pay for. Using Postfix with AD to authenticate is a good step in the right direction, and our next step will be looking at Calendaring options that will mesh into Outlook since most end users prefer using Outlook. Thank you for any help or suggestions, Tom Warfield