dovecot - Jan 2022 - Order of loading and checking userdb on Ubuntu

When using the lmtp service for local delivery, I'd like to change the  
user lookup to only use the user portion of the email address.

I think I do that in the 20-lmtp.conf file, but not exactly sure how.

 From what I've found on the web, I just need to change the  
auth_username_format=%n.

I feel confident that I'm not doing it right.

older posts implied that the order things are loaded is an issue, but  
not sure if that is the case anymore.

My goal is to set username_format for only lmtp.

Thanks for any help.

BTW, I THINK the right answer is just to set

auth_username_format = %Ln

in 20-lmtp.conf to make it look like this:

protocol lmtp {
   # this postmaster_address entry is required???  Saw that in a much  
older post
   postmaster_address = postmaster at mydomain.com
   # Space separated list of plugins to load (default is global mail_plugins).
   mail_plugins = $mail_plugins sieve
   auth_username_format = %Ln
   info_log_path = /var/log/dovecot-lmtp.log
}




Just want to make sure that it will only affect lmtp.

Mike

Quoting Mike <barjunk at attglobal.net>:
> When using the lmtp service for local delivery, I'd like to change  
> the user lookup to only use the user portion of the email address.
>
> I think I do that in the 20-lmtp.conf file, but not exactly sure how.
>
> From what I've found on the web, I just need to change the  
> auth_username_format=%n.
>
> I feel confident that I'm not doing it right.
>
> older posts implied that the order things are loaded is an issue,  
> but not sure if that is the case anymore.
>
> My goal is to set username_format for only lmtp.
>
> Thanks for any help.