Messages sent to alias+detail end up in INBOX

ml at ml at
Thu Feb 18 17:02:46 EET 2021

On Thu, 18 Feb 2021 08:44:30 -0500
Daryl Richards <daryl at> wrote:

> On 2021-02-18 7:19 a.m., ml at wrote:
> > So, there is now way that Dovecot can create folders with "detail"
> > name for mail sent to "alias+detail" address?  
> Have you checked the dovecot settings for lmtp_save_to_detail_mailbox 
> and recipient_delimiter?


Yes, I have "lmtp_save_to_detail_mailbox = yes" and recipient_delimiter set to +. Everything is working as long as I send a message to "user+detail", i.e. to an existing user. The problems start when I try to send to a combination of an alias and a detail: "alias+detail". Then the message is just put into INBOX of the respective user regardless of what I try to define in sieves with ":detail" rule.

Denis Shadrin

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