Check that catch-all mail address is working

This method no longer works. The quickest way seems to be to just send an email. Oh well…

Kimi AI has some other ways, if needed later.

It is possible for the catch-all email address to be turned off in DirectAdmin’s admin level and this means that all the catch-all addresses stop working and need to be set again when the catch-all is turned back on.

First find out the mail server address (using clickforcharity as an example)

nslookup -type=mx clickforcharity.net