dovecot - Oct 2020 - Looking for a guide to collect all e-mail from the ISP mail server

> There are plenty of guides available. I don't know your mother tongue,
> but seeing your last name, I assume you may be speaking German. Take a
> look at these German language guides:
I do speak German, thanks for the links.

>
https://www.it-management-kirchberger.at/manuals-tutorials/server-centos-7/postfix-mailserver-vimbadmin/postfix-amavisd-new-clamav-spamassassin.html
I could not find anything there related to multidrop or "catch all"
mailboxes.

> https://www.dokuwiki.tachtler.net/doku.php
Nothing like that there either.

> https://dokuwiki.nausch.org/doku.php/centos:mail_c7:spam_6
This is a huge document with little introduction. It seems to be mostly about
fighting spam. I did not find anything like the setup I described.

Regards,
   rdiez

[...]
> I could not find anything there related to multidrop or "catch
all" mailboxes.
[...]
> Nothing like that there either.
[...]
> This is a huge document with little introduction. It seems to be
> mostly about fighting spam. I did not find anything like the setup I
described.
looks like the collective wisdom of this group can't provide precisely
what you are looking for. You may need to figure it out by yourself.

Btw., why is an open port 25 evil if the MTA is configured correctly?
Can you elaborate, please? 

best regards
---
Michael Schumacher

I remember back in the dialup era there was a small company in Timisoara 
who tried to sell this kind of solution. (They started to sell servers 
after a while so I guess they didn't have much success selling? their 
workaround) So I guess it is not trivial to sort again all the mails and 
deliver each one in a mailbox after you mixed all together in a single 
catchall mailbox. Could be done for sure but it is some work to do...? 
Also there is some management: what to do with the catchall mailbox? 
Delete each mail after successfully downloaded? Use IMAP and sync it for 
a while to have a backup?

On 10/26/20 6:34 PM, Michael Schumacher wrote:
> [...]
>> I could not find anything there related to multidrop or "catch
all" mailboxes.
> [...]
>> Nothing like that there either.
> [...]
>> This is a huge document with little introduction. It seems to be
>> mostly about fighting spam. I did not find anything like the setup I
described.
> looks like the collective wisdom of this group can't provide precisely
> what you are looking for. You may need to figure it out by yourself.
>
> Btw., why is an open port 25 evil if the MTA is configured correctly?
> Can you elaborate, please?
>
> best regards
> ---
> Michael Schumacher
>

> Btw., why is an open port 25 evil if the MTA is configured correctly?
> Can you elaborate, please? 
He does not know, that is why he assumes this. He first needs to aquire 
some basic principles and learn, as he wrote.