mkelly said earlier in this thread (
here) that it was implemented on 29 October.
Plusnet T&C also state:-
"8.1.1 You must accept and read regularly email to postm
aster@<username>.plus.com." (Although I thought there was talk of a change to that some time ago - as long as there was another email address official stuff could go to.)
If someone signs up with Plusnet then they've agreed to check their postmaster address - if they don't that is, as you say, their problem. As that is a Plusnet managed address the only place mail is likely to get rejected or blocked is because of something that the user has implemented.
plusnet ADSLMax
Life is what happens while you're busy making other plans. (John Lennon)