Email alias woes

Hi all,

New hosting at DH, domain transferred from another host. DNS records updated > 3 days ago.

I have set up 1 mailbox and 10 aliases. The mailbox doesn’t deliver locally, but forwards to an address at gmail. All aliases forward to the local mailbox (which will then forward to the gmail address).

For some reason, the mailbox address and 1 alias happily forward email to gmail. All email sent to any of the other aliases is completely lost - not delivered, no error responses, just disappearing into the void.

There doesn’t appear to be a problem with DNS as the mailbox and 1 alias is working. There doesn’t appear to be a problem with having the alias forward to the mailbox as 1 of them works at least. Still waiting for response from official support.

Anyone ever seen this before, and fixed it?