The most crucial difference is that LDA is intended for delivering email to a *real* user.

Aki

On June 24, 2016 at 7:59 PM Jan Büren jan@kivitendo-premium.de wrote:

Hi Michael,

...

I'd appreciate comments from experienced users of postfix with dovecot. Are you using Dovecot LDA or LMTP and why? I have LMTP with dovecot running on Ubuntu 14.04 and Ubuntu 16.04.

LDA is the worser solution, this is best explained in chapter LTMP in Peers dovecot book, which is unluckily in german and more or less out of print.

But you can easily grasp the configuration details and reverse engineer the technical german phrases ...

...

Thanks much,

Michael

-- kivitendo mit Schnelleinstieg zu RB-Druckvorlagen im Linux-Magazin 07 DELUG-DVD Ausgabe

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On 26/06/2016 02:39, Michael Fox wrote:

...

The most crucial difference is that LDA is intended for delivering email to a *real* user.

Aki

Thanks Aki.

Pardon my ignorance, but why does it matter? In other words, what is it that makes LDA better for a *real* user and LMTP better for a virtual user?

Thanks, Michael

We've used LDA for virtual users for a very very long time, though we use multiple front ends, each with postfix/dovecot and mysql (replicated DB) they all talk to one big storage backend via NFS (as do the pop3/imap/webmails servers), we looked at lmtp once but saw no advantages given the setup.

-- If you have the urge to reply to all rather than reply to list, you best first read http://members.ausics.net/qwerty/

Thanks Jan.

I've been trying to obtain an English copy of the Dovecot book for months, prior to starting this project. So far, I just can't find a copy. It's too bad that the author/publisher won't do a second printing or, if they're not interested in making any more money, then release it to the public domain as a PDF. Very frustrating.

Michael

-----Original Message----- From: dovecot [mailto:dovecot-bounces@dovecot.org] On Behalf Of "Jan Büren" Sent: Friday, June 24, 2016 10:00 AM To: dovecot@dovecot.org Subject: Re: Postfix and Dovecot LDA vs. LMTP

Hi Michael,

...

I'd appreciate comments from experienced users of postfix with dovecot. Are you using Dovecot LDA or LMTP and why? I have LMTP with dovecot running on Ubuntu 14.04 and Ubuntu 16.04.

LDA is the worser solution, this is best explained in chapter LTMP in Peers dovecot book, which is unluckily in german and more or less out of print.

But you can easily grasp the configuration details and reverse engineer the technical german phrases ...

...

Thanks much,

Michael

-- kivitendo mit Schnelleinstieg zu RB-Druckvorlagen im Linux-Magazin 07 DELUG-DVD Ausgabe

Richardson & Büren GmbH Jan Büren Kölnstr. 311 53117 Bonn

USt-IdNr. DE238288407 Telefon: 0228 92 98 2012

Durchwahl: 0228 92 97 8965

Thanks again Jan.

I appear to have basic LMTP working now (messages are delivered to virtual mailboxes of valid recipients and non-existent recipients are rejected). Cool. Still lots more work to do.

But I think I could really use the Dovecot book. I find the wiki to be lacking in explanation. So, too often I'm just copying without knowing the reason why or how some things fit together.

Peer: Is there any way to get an English copy of your book?

Michael

-----Original Message----- From: dovecot [mailto:dovecot-bounces@dovecot.org] On Behalf Of "Jan Büren" Sent: Saturday, June 25, 2016 12:53 PM To: dovecot@dovecot.org Cc: Peer Heinlein p.heinlein@heinlein-support.de Subject: RE: Postfix and Dovecot LDA vs. LMTP

Hi Michael, we´ll actually the author is reading this list as well. Maybe he can help out here (cc). As far as I know went the publisher bancrupt and that´s why currently further prints and next books are delayed.

@Peer: Anyway, is there a english copy? More or less I am refering to the chapter LMTP with dovecot and postfix.

Hmm, just with the information in the dovecot wiki, there is at least the postfix part missing: http://wiki2.dovecot.org/HowTo/PostfixDovecotLMTP

Best luck,

...

Thanks Jan.

I've been trying to obtain an English copy of the Dovecot book for months, prior to starting this project. So far, I just can't find a copy. It's too bad that the author/publisher won't do a second printing or, if they're not interested in making any more money, then release it to the public domain as a PDF. Very frustrating.

Michael

...

-----Original Message----- From: dovecot [mailto:dovecot-bounces@dovecot.org] On Behalf Of "Jan Büren" Sent: Friday, June 24, 2016 10:00 AM To: dovecot@dovecot.org Subject: Re: Postfix and Dovecot LDA vs. LMTP

Hi Michael,

...

I'd appreciate comments from experienced users of postfix with dovecot. Are you using Dovecot LDA or LMTP and why? I have LMTP with dovecot running on Ubuntu 14.04 and Ubuntu 16.04.

LDA is the worser solution, this is best explained in chapter LTMP in Peers dovecot book, which is unluckily in german and more or less out of print.

But you can easily grasp the configuration details and reverse engineer the technical german phrases ...

...

Thanks much,

Michael

-- kivitendo mit Schnelleinstieg zu RB-Druckvorlagen im Linux-Magazin 07 DELUG-DVD Ausgabe

Richardson & Büren GmbH Jan Büren Kölnstr. 311 53117 Bonn

USt-IdNr. DE238288407 Telefon: 0228 92 98 2012

Durchwahl: 0228 92 97 8965

-- kivitendo mit Schnelleinstieg zu RB-Druckvorlagen im Linux-Magazin 07 DELUG-DVD Ausgabe

Richardson & Büren GmbH Jan Büren Weiherstraße 33a 53111 Bonn

USt-IdNr. DE238288407 Telefon: 0228 92 98 2012

Durchwahl: 0228 92 97 8965

imho wiki is the way to go to be up2date with information, else it would make more sense to make more informative man pages in dovecot, that will never be outdated

I agree that the wiki is useful and important. It just doesn't have any depth regarding the "why" and "how" part of the equation. For example, WHY LMTP vs. LDA (just one example). There are many config snippets with a couple of lines of explanation and not much about how they fit into the big picture. And some config examples (like the default_fields and override_fields issue I reported earlier) simply don't work.

In the Postfix world, there is an old Postfix book (older than Peer's book) which goes into a lot of the "why" and "how". It takes you through the whole process from nothing to a full-fledged server and really gives you the big picture. All of that is still valid today. Then the postfix website is the place to go for up-to-date description of each config option. Even there, the web pages contain much more descriptive information about each config option -- how it's used, when, why, side-effects, etc.

If I knew what I was doing, I'd offer to help add to the wiki. But as a newbie, I don't even know what I don't know. ;-)

So I'm hoping that Peer's book will provide that overall big-picture and that I can find an English copy somehow.

Michael

On 26/06/2016 4:50 PM, Peer Heinlein wrote:

Am 25.06.2016 um 21:52 schrieb "Jan Büren":

...

...

I've been trying to obtain an English copy of the Dovecot book for months, prior to starting this project. So far, I just can't find a copy. It's too bad that the author/publisher won't do a second printing or, if they're not interested in making any more money, then release it to the public domain

The book company has to shut down their business last december.

It took some time to get the copyrights back, to talk to some other book companies and to get everything ready. Actually we're one the way to get the book back into the shop into the next few weeks.

Peer

In English as well this time Peer? I will buy a copy if it is available in English . . .

Actually we're one the way to get the book back into the shop into the next few weeks.

Peer

That's great news! English version please!

Michael