Currently, I have around 20 domains set up in my cloudron. To not miss any emails (spam is quite low on all of them) I set up already catchall mailboxes, but unfortunately I can only catch emails per domain. This results in 20 different mailboxes, I have to check regularly.
I would love to set up a single catchall mailbox, where all mail from all 20 domains is going to, if there is no alias available.
Cross-domain aliases are already possible, what I really appreciate, but for catchall it would really be the icing on the cake