Hi,

My situation is this:
I have a domain example.com and an alias-domain alias.com.
On example.com, I have a few accounts and otherwise a catchall thats receives all emails that are not sent to one of the existing accounts, i.e. notauser@example.com.
And I want to receive emails for notauser@alias.com as well.
I have read the docs here: docs.mailcow.email Icon Sender and receiver model - mailcow: dockerized documentation

docs.mailcow.email Icon docs.mailcow.email
Sender and receiver model - mailcow: dockerized documentation
None
docs.mailcow.email

It says: “It is important to know, that you are not able to receive mail for my-alias@my-alias-domain.tld. You would need to create this particular alias.”
But then it says: "Please note that this does not apply to catch-all aliases:

Alias domain alias.com is added and assigned to primary domain example.org
me@example.org is assigned the catch-all alias @example.org
me@example.org is still just known as me@example.org, which is the only available send-as option

Any email send to alias.com will match the catch-all alias for example.org"

So to me, this sounds like it should work.

But when an email sent to notauser@alias.com arrived, postfix rejected it with this error message: “Recipient address rejected: User unknown in virtual mailbox table”

So what is going on? Do I misinterpret the docs and my plan should not work? Should it work and I have misconfigured something?

Thanks!

6 days later

I’m sure you can just add it under the aliases as a normal cache all address like you did with domain.com

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Thanks.
The way I understand the docs is: If there is a particular user@alias.com, incoming emails are sent there. notauser@alias.com will be sent to catchall@example.com. So it should work, based on the docs, if I understand them correctly.
Nevertheless, I do have a catchall@alias.com as well. So based on your suggestion, it should also work.
But, it doesn’t 🙁
Is it possible that the catchall@alias.com is actually keeping it from working as suggested in the docs?

6 days later
3 months later

From the alias page itself:

Aliases are not applied on domain aliases automatically. An alias address my-alias@domain does not cover the address my-alias@alias-domain (where “alias-domain” is an imaginary alias domain for “domain”).
Please use a sieve filter to redirect mail to an external mailbox (see tab “Filters” or use SOGo -> Forwarder). Use “Expand alias over alias domains” to automatically add missing aliases.

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