Help using email and hosted domain please

[#1]

For several years I've had a hosted domain and run my own mail server on a machine at home.
I've decided to stop this and use the PN mail instead. I currently have 4 email addresses "person1@hosteddomain.co.uk", "person2..." etc and each person connects to my imap server to collect their mail.
To switch to PN I've done the following:
deleted my additional DNS records and just left the mx.last.plus.net. and checked the 'POP3 Collect email by POP3' box
created 3 additional email accounts under the 'Manage My Mail' page : "person1@", "person2@" etc
The problem now seems to be that I can't see any emails sent to person1@hosteddomain.co.uk" but emails to "person1@plusnetaddress.plus.com" arrive fine.
Is this just the changed DNS records taking time to propagate or have I missed something?
Thanks
-Mat

[#2]

Your domain will need to be set up on Postini - that may have not happened when you turned off SMTP. I suggest you raise a ticket.

[#3]

Thanks Jelv,
I've done that.
-Mat