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Date:      Fri, 19 Sep 2014 16:38:28 +0100
From:      Arthur Chance <freebsd@qeng-ho.org>
To:        Dale Scott <dalescott@shaw.ca>
Cc:        Matthew Seaman <matthew@FreeBSD.org>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Re: is pkg saying courier and postfix are incompatible?
Message-ID:  <541C4DF4.1070204@qeng-ho.org>
In-Reply-To: <F7EA154A-8B44-4BA2-9787-2C8FEA8DE987@shaw.ca>
References:  <005201cfd2bd$d8ac34d0$8a049e70$@shaw.ca> <9745AE56F096E150A334CBD1@[192.168.1.50]> <D5F199B3-79EF-4CED-B373-EA8CD2E6A265@shaw.ca> <541A7518.7030603@FreeBSD.org> <009601cfd398$51ca0ec0$f55e2c40$@shaw.ca> <541BD0C1.6080509@FreeBSD.org> <541BDA6D.3060702@qeng-ho.org> <F7EA154A-8B44-4BA2-9787-2C8FEA8DE987@shaw.ca>

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On 19/09/2014 15:12, Dale Scott wrote:
>> On Sep 19, 2014, at 1:25 AM, Arthur Chance <freebsd@qeng-ho.org> wrote:
>>
>>> On 19/09/2014 07:44, Matthew Seaman wrote:
>>>> On 19/09/2014 00:28, Dale Scott wrote:
>>>> I installed postfix-2.11.1_4,1 as a pkg and just noticed "pkg info
>>>> postfix" reports DOVECOT and OPENLDAP options are off. Do I need
>>>> these in my scenarios? I didn't put a ports tree on this system to
>>>> see if it was possible to build a system from packages only, but am
>>>> also not averse to recognizing it was pipe dream (and remember how to
>>>> use portmaster again).
>>>
>>> You can use postfix with dovecot without having to enable the DOVECOT
>>> option -- as I recall, that's something to do with postfix using the
>>> dovecot authentication mechanisms.
>>
>> That's correct, it's to enable postfix to use dovecot's SASL interface
 >> to authorise users when postfix requires authorisation for mail 
submission.
 >> Much nicer to have one mechanism rather than two that might get out 
of sync.
 >> However, if authorisation is enforced via /etc/passwd or LDAP, you've
 >> already got your mechanism so don't need dovecot's.
>>
>>> You only need OPENLDAP turned on for postfix if you want to use ldap
>>> lookups.  (Well Duh!) For a stand-alone system without many users, ldap
>>> is overkill, and you would generally be better off using lmdb or bdb
>>> files instead (I prefer lmdb -- seems simpler and to have fewer overheads).
>>
>> And it's fast, if you have a lot of mail to process.
>>
>>>> Is there anything special needed in Dovecot?
>>>
>>> No.  Either you configure postfix to use dovecot's delivery agent, or
>>> you make postfix speak LMTP to dovecot: from dovecot's perspective it
>>> doesn't need to know anything about or do anything differently depending
>>> on what MTA you're using.
>>
>> LMTP has the advantage that postfix and dovecot can be in separate jails for
 >> extra security.
>
> Thanks for all the help. I'm building a fully *self-contained* proof-of-concept
 > business system with MantisBT as an ISO9000 issue tracker, Tryton for 
managing
 > equipment and material loaned to client jobs and returned, OpenLDAP 
for single
 > point of authentication (enterprise is MS AD), and mail working 
between users,
 > Mantis and Tryton. I'll use Mutt in the first round of demos, but 
will provide
 > RoundCube for demo users to access mail themselves (once virtual mail 
users are
 > working). I'm ignoring security for now, too much to learn, create 
keys and
 > configure, and the IT group will have their own ideas anyway if the 
POC proceeds
 > to production. Hopefully it won't look too disjointed, the 
alternative is maybe
 > funding in 2016 for the IT team to build the same thing but with 
better icons
 > (and by clicking through MS wizards ;-))
>
> It could be a nice bonus if I could use my desktop Outlook client to retrieve
 > all the mail from Dovecot via pop3 and forward it into the enterprise 
system
 > so demo users could really experience the POC, but the POC can't connect
 > directly to any enterprise services (e.g mail) for now. Any comments 
on this
 > approach?

I've never used Outlook in my life, so can't comment on that side of it, 
but dovecot does POP3 as well as IMAP. It's not as good as IMAP, but for 
a demo should be good enough.

See http://wiki2.dovecot.org/POP3Server



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