@Mayfly there's two aspects to your questions
1) When PN send me an email I always get the email twice, once to each address.
PN send informatory emails e.g billing notifications to the contact address listed on the account and additionally, if the account has Plusnet email, to postmaster@<account>.plus.com ( note that accounts opened in the last two years or so dont have Plusnet email ). These emails have nothing to do with Greenby, they are purely to do with Plusnet sending notifications and will continue to be sent to those addresses.
2) And my own domain @vxxx-dxxxx.co.uk
Your domain hosted with Plusnet will migrate to Greenby at the same time as your <account>.plus.com email. Accounts with hosted domains are more complex than others and so will be the last in the schedule to be migrated. No accounts with hosted domains are in the current plus.com migration schedule. When they are finally migrated, both your plus.com and <domain> email will be handled by Greenby.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
