Quota Config With Prefetch Creating Alias Directories

[Kevin N.]

For the first part of the issue maybe you could use Postfix's 
smtpd_restriction_classes combined with Dovecot's quota_grace, as 
described in this older thread:
https://dovecot.markmail.org/thread/5sa563icpv2os2nb#query:+page:1+mid:gkhwgzfvipzaixtl+state:results

I haven't tried it though.

Cheers,

Kevin


On 27/06/2021 05:32, dovecot at ptld.com wrote:
>> On 06-26-2021 7:39 pm, dovecot at ptld.com wrote:
>>
>> First question: Is this the best way to configure dovecot using quota
>> verification for postfix to work will aliases?
>>
>> Second question: How can i prevent directories and indexes being
>> created for non found user (aliases) accounts?
> 
> I figured out i was doing it wrong, i removed the "result_failure = 
> return-ok" and used "quota_status_nouser = DUNNO" instead. However, now 
> i have another concern.
> 
> * I setup an email account for user at example.com
> * I setup an alias alias at example.com to forward to user at example.com
> * I filled up user at example.com inbox so it would fail quota.
> * I sent an email to alias at example.com
> 
> Postfix did not reject the email, it accepted it and tried to deliver to 
> dovecot/lmtp which then rejected the message for being over quota. This 
> caused postfix to have to send a back splatter bounce email. Anyway to 
> solve that?
> 
> But worse, the bounce email exposed the forwarded to address of 
> user at example.com saying mailbox full.
> "<user at example.com> (expanded from <alias at example.com>)"
> 
> What can be done about that? Keep the bounce notice from exposing the 
> forward to address? Or is there still a better way to set this up?