hi there,

I'm using winbind to auth against Active Directory and a perl script to draw
down all the users with valid e-mail address from AD into a file
(/etc/postfix/usernames_forlocalmaps). I want only local users and the users
in that file to be able to receive mail, in my /etc/postfix/main.cf file at
the moment i have it set like this

local_recipient_maps = proxy:unixasswd.byname
hash:/etc/postfix/usernames_forlocalmaps

i have restart the postfix server, but i can still send mail to people that
arn't on that list.

for example my AD users are

paul
sarah
daniel

but only paul and sarah are in the list
'/etc/postfix/usernames_forlocalmaps' but i can still send mail to daniel

the format of my list is as follows

paul OK
sarah OK

can someone tell me what i'm doing wrong?

Did you postmap the file after making it?

yes i did, but now the problem turns out to be squirrelmail, if i use another client, it will not send e-mails to anyone thats not on the list, so i don't think squirrel mail is using postfix.

i'm trying to get squirrel mail to use postfix so when a message is sent it goes via the 'local_recipient_maps' option in postfix first. but in the 'config/conf.pl' there is only an option of sendmail/SMTP i've set it to use SMTP, but that has no effect.

If you've got "permit_mynetworks" in the smtpd_recipient_restrictions before the local_recipient_maps, it will always accept the sendmail executable as it's local. No more rules will be checked..

Who would be using SquirrelMail apart from local users?

i use winbind users, this is what i have done if your interested

http://www.yourhowto.org/content/view/25/9/