[olug] Postfix & dovecot

[Sam Flint]

Thanks Kevin.

Sam

On Fri, Oct 19, 2012 at 8:29 AM, Kevin <sharpestmarble at gmail.com> wrote:
> Have you checked out Postfix/Dovecot integrating with Pam?
>
> On Fri, Oct 19, 2012 at 7:56 AM, Lou Duchez <lou at paprikash.com> wrote:
>> I don't know how to do that, sorry. Quickest way might be to figure out how
>> to make Dovecot use system authentication, and then Postfix will be able to
>> glom on to that.
>>
>>
>>> 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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>>>
>>>
>>>
>>
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-- 
Sam Flint
flintfam.org/~swflint