Delivering locally through the Submission Server

[John Fawcett]

On 02/11/2020 20:17, R. Diez wrote:
> Hi all:
>
> I am learning Dovecot step by step. I have enabled the Submission
> Server, in the hope that I would not need to learn other MTAs like
> Postfix.
the submission server is a proxy in front of an MTA. You can't avoid
having an MTA somewhere in your solution.

https://doc.dovecot.org/admin_manual/submission_server/

>
> The Submission Server is very comfortable: it picks up the existing
> Dovecot configuration, so that you do not need to configure any user
> authentication separately. It is working fine on my test setup.
>
> My first thought was that, if the recipient is a local mailbox, the
> Submission Server would not need to relay the message to any external
> SMTP server, as it could just deliver it locally. After all, it is
> running on the same Dovecot.

what should it do with the non local messages or local messages directly
at aliases?

John

>
> But it cannot do that, can it? Is there a work-around? I am still
> hoping that the mail server still works locally if the Internet
> connection fails. But I would need to learn some Postfix magic for
> that, would I?
>
> Thanks in advance,
>   rdiez