Domain only domains and mailbox routing

[lsl]

Domain only sites can't setup a new mailbox after deleting all your current mailboxes.

Domain only sites:

https://github.com/user-attachments/assets/1e3e70a5-c5d9-4a39-a73c-d118b3978d7a

Normal sites:

https://github.com/user-attachments/assets/29323853-1a00-4489-ada1-c31136c20017

Steps to repro:

• Register a domain without a site from manage all domains screen /domains/manage
• Register a mailbox with titanmail
• Remove the mailbox
• You're left with a mailbox credit you're unable to re-setup as all setup entrypoints route back to /domains/manage

I'm assuming this is middleware to checking for domain only sites somewhere and doing a redirect.

[lsl]

Could argue this is high priority but it's been like this for a while and I don't think many people get into this state (low impact), I only happened to find it testing a separate change.

[Robertght]

📌 REPRODUCTION RESULTS

• Tested on Simple – Could Not Replicate

📌 FINDINGS/SCREENSHOTS/VIDEO

• This is what I found:

https://github.com/user-attachments/assets/9397df82-7f2a-4ad2-a2e9-6e13b0688a49

📌 ACTIONS

• I've tested this several times but I couldn't replicate it.

📌 Message to Author

• @lsl is there something from the testing steps that I've missed in the promise?
• Also, I encourage you to use Bugomattic reporting issues so that we could triage them more efficiently. :)