dovecot - Apr 2022 - auth between postfix and dovecot?

Am 23.04.2022 um 16:08 schrieb Shawn Heisey:
> On 4/22/2022 10:35 PM, ??? (alice) wrote:
>> my question is:
>>
>> when postfix talks to dovecot, does it require user's 
>> username/password for authentication? or this communication just goes 
>> without authentication?
[ ... ]
> When postfix sends mail to dovecot for delivery, I'm pretty sure that 
> happens without authentication.? It's LMTP via unix socket, not 
> something an outside client can access directly.
> 
> # In 10-master.conf
> service lmtp {
>  ? unix_listener lmtp {
>  ??? #mode = 0666
>  ? }
> }
[ ... ]
> # Tell postfix to hand off mail to the definition for dovecot in master.cf
> virtual_transport = dovecot
> dovecot_destination_recipient_limit = 1
With this Postfix configuration you do not make use of LMTP delivery.

Alexander

On 4/23/2022 9:07 AM, Alexander Dalloz wrote:
> With this Postfix configuration you do not make use of LMTP delivery.
Interesting.? I thought it was using LMTP but it looks like master.cf 
has it running /usr/lib/dovecot/dovecot-lda to deliver. Would LMTP be a 
better option? It has always worked, so I didn't look at it very closely.

I thought I had something in the postfix/dovecot combination using LMTP, 
but it looks like I was wrong about that.? The communication between 
postfix and mailman3 running in docker containers (which is a very 
recent addition) uses LMTP.

Thanks,
Shawn