dovecot - Feb 2021 - Messages sent to alias+detail end up in INBOX

Hi, everyone!

I have seemingly correct settings for details to work: when I send a message to
user+detail at mydomain.tld, it goes into the "detail" folder of user
at mydomain.tld.

Also I have working aliases, so when I send a message to alias at mydomain.tld,
it goes into the INBOX folder of user at mydomain.tld.

I expected that when I send a message to alias+detail at mydomain.tld, it would
go into the "detail" folder of user at mydomain.tld. However, it goes
into the INBOX folder of user at mydomain.tld.

Is it the intended behavior?

Pertinent settings:
recipient_delimiter?=?+
lda_mailbox_autocreate?=?yes

Or are these settings not the only ones pertinent to the case?

-- 
Respectfully,
Denis Shadrin

Hi Denis,

> I expected that when I send a message to alias+detail at mydomain.tld, it
would go into the "detail" folder of user at mydomain.tld. However, it
goes into the INBOX folder of user at mydomain.tld.
> 
> Is it the intended behavior?
It is.

To achieve the desired folder, you need a sieve script:

https://wiki.dovecot.org/Pigeonhole/Sieve/Examples#Plus_Addressed_mail_filtering

Ensure that you also subscribe to newly created mailboxes 
(lda_mailbox_autosubscribe=yes).


Best,
Anton