==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version: 1.4.0, iRedAPD: 1.5
- Deployed with self-installer
- Linux Version: Ubuntu 20.04.3 LTS (Kernel 5.4.0-91-generic, fully updated)
- Backend: MariaDB (MySQL)
- Web server: Nginx
- iRedAdmin-Pro: NO
====

Hello iRed Forum / 你好莊主任,

I run a successful iRedMail server, with multiple domains, with SPF / DKIM / DMARC. I am very familiar with Linux, DNS, SQL, but only a little familiar with postfix and dovecot. Thank you for building this wonderful software package to tie it all together! I have searched the forum and docs, and cannot find this topic.

I am curious about creating an EXCEPTION for catch-all for a domain.

Reason: Current dmarc for client domain (example "client.com") has RUA and RUF for my administrative domain (example "admin.com"): rua=mailto:postmaster@admin.com.

The client needs catch-all as they use a number of addresses and have the occasional misspelling.

However, I do not need them recieving dmarc reports.
But I believe having the RUA go to my admin domain is negatively impacting their deliverability.

I have tested with another domain ("personal.com") where the RUA / RUF is the same domain: mailto:postmaster@personal.com, and I have no problems with email delivery to any major domain.

I want to set the RUA for client.com to postmaster@client.com, but carve an exception to the catch-all for this.

My testing indicates that the vmail forwardings do not care about order; if I insert a row above their catch-all, it still will send to their catch-all address and not stop processing directives.

I have looked into postfix specific header rewriting:
http://www.postfix.org/ADDRESS_REWRITING_README.html
... but I am not sure about what to implement (canonical rewrite, address masquerade, virtual aliasing).
I am also not sure if those settings will preempt / prevent the iRedMail / vmail / iRedAPD from also handling the catch-all setup.

Any insight would be greatly appreciated and of course coffee will be donated
Otherwise I may have time this month to spin up a second test server and tinker with a spare domain.

I think this capability may make an excellent addition to iRedMail-Pro, but I understand that may be a long-term goal and require a little re-engineering of the mail flow process.

Thank you anyone who sees this or has any ideas!