Re: [Postfixadmin-devel] Backup MX with Postfixadmin

[Fongaboo <pos...@fo...>]

So if you had an actual POP/IMAP box on the primary, how did it manifest 
in Postfixadmin on the secondary?


On Mon, 27 Feb 2023, Janfred wrote:

> Hi,
>
> (I'm not a postfixadmin maintainer, just an interested user)
>
> I had a quite similar use case, actually with the additional requirement that 
> my mail servers were a proxy for some domains, so we had to forward all 
> incoming mail for specific domains to external hosts.
>
> For this usecase I patched posfixadmin manually, I have since created a pull 
> request, but would need to work on that to see if it would work with the 
> current version, my initial patch is some years old now.
>
> The basic idea was to introduce the possibility to define a primary mail 
> server for each domain and only the primary would then deliver mails to local 
> mailboxes.
> The secondary mail server(s) would behave to the outside world exactly like 
> the primary, including resolving aliases and doing forwards, but every mail 
> that needs to be delivered to a local mailbox would get forwarded to the 
> primary.
>
> If you have input on that, please feel free to reach out to me or review the 
> pull request.
> Any feedback is appreciated.
>
> Cheers,
> Janfred
>
> On 27.02.23 20:24, Fongaboo wrote:
>> 
>> I have my primary mail server running postfix with MySQL backend and 
>> PostfixAdmin front-end. Works as advertised.
>> 
>> For years my backup MX has just been configured to accept all mail for 
>> configured domains, and store-and-forward. But we know that hasn't been a 
>> good practice for a long time.
>> 
>> I have finally set up my backup MX with the same postfix/MySQL/postfixadmin 
>> stack as the primary. I see you can check off Backup MX as an option in 
>> Domains.
>> 
>> But I want to populate the backup MX with valid users so that anything else 
>> gets denied. How do you do that in a Postfixadmin setting?
>> 
>> Do aliases have to be created pointing to the same destination as is set on 
>> the primary?
>> 
>> How are addresses that are actual POP/IMAP mailboxes on the primary 
>> handled? Do you have to make an actual mailbox on the secondary? Or can you 
>> just make a matching alias? If the latter, what to point the aliases to?
>> 
>> Should I be planning to migrate the entire MySQL database as-is to the 
>> secondary server, but then have some script that sets backupmx=1?
>> 
>> 
>> TIA
>> 
>> 
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