[olug] Postfix & dovecot

[Sam Flint]

I want to use the system authentication

On Fri, Oct 19, 2012 at 1:28 AM, Lou Duchez <lou at paprikash.com> wrote:
> Do you mean you're setting up a mail server for foo.com, bar.com, oob.com,
> and arf.com: so if I am sending an E-Mail to frank at foo.com, the E-Mail
> should be delivered to the server you're setting up, and should wait there
> so Frank can IMAP in and read it?
>
> To handle the accepting of mail from any source, here's what you'd need in
> /etc/postfix/main.cf:
>
> virtual_mailbox_domains = foo.com bar.com oob.com arf.com
> smtpd_relay_restrictions = permit_sasl_authenticated
> reject_unauth_destination permit
>
> As for Dovecot and IMAP (and I would guess you'll want to use Dovecot
> authentication for your Postfix SMTP relay), here's what works for me, based
> on the following design:
>
> -    I've got a directory called /vmail .
> -    E-Mail to frank at foo.com is stored under /vmail/Maildir/foo.com/frank .
> -    I've got a text file called /vmail/passwords that lists my logins and
> passwords (the format will be specified below).
> -    I've created users "dovecot" and "postfix" to run their respective
> utilities.
> -    "dovecot" is UID 501 and GID 501.
> -    There will be a socket called /vmail/passwordsocket that dovecot
> creates, so that postfix has a way to ask dovecot to validate logins and
> passwords.
> -    This is by no means the best or most secure system out there.  I'm just
> trying to give you a simple thing to get the ball rolling.
>
> In /etc/dovecot/dovecot.conf:
>
> auth_mechanisms = plain login
> disable_plaintext_auth = no
> mail_location = maildir:/vmail/Maildir/%d/%n
> userdb {
>   args = /vmail/passwords
>   driver = passwd-file
> }
> passdb {
>   args = /vmail/passwords
>   driver = passwd-file
> }
> service auth {
>   unix_listener /vmail/passwordsocket {
>     group = postfix
>     mode = 0660
>     user = postfix
>   }
>   user = dovecot
> }
>
>
> And in /etc/postfix/main.cf, you'd need the following:
>
> virtual_mailbox_base = /vmail
> home_mailbox = Maildir/
> virtual_minimum_uid = 100
> virtual_uid_maps = static:501
> virtual_gid_maps = static:501
> smtpd_sasl_auth_enable = yes
> broken_sasl_auth_clients = yes
> smtpd_sasl_type = dovecot
> smtpd_sasl_path = /vmail/passwordsocket
> virtual_mailbox_maps = hash:/etc/postfix/vmailbox
> virtual_alias_maps = hash:/etc/postfix/virtual
> show_user_unknown_table_name = yes
> inet_interfaces = all
> myhostname = mail.foo.com
>
>
>
> After that is the small matter of defining your mailboxes.  Your
> /vmail/passwords would contain lines that looked like:
>
> frank at foo.com:{plain}frankspassword:dovecot:dovecot
>
> And postfix would need entries set up in /etc/postfix/vmailbox that looked
> like:
>
> frank at foo.com    foo.com/frank/
>
> After any changes to /etc/postfix/vmailbox you'd need to run "postmap
> /etc/postfix/vmailbox".
>
>
>
> I think this is just about right; I'm basing this on a configuration that I
> set up years ago, it has served me well, and I have since modified it to add
> assorted functionality.  Hopefully I have provided all the necessary nuts
> and bolts and haven't left anything out, IKEA style.
>
>
>
>
>
>> How do I set postfix up to accept mail from any source for four
>> different domains with no user diferentiation?  how do i set up
>> dovecot to use passwd authentication and provide IMAP services for
>> those users?
>>
>>
>> Sam
>>
>
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-- 
Sam Flint
flintfam.org/~swflint