double trouble

[#1]

It's no big deal for me but I am curious...
Why does Plusnet always send me TWO identical emails, with exactly the same time stamp, to let me know I'm getting near my usage limit?
stuck

[#2]

one is always sent to postmaster, the other to your preferred address, the only difference is the envelope to

[#3]

If you go to this link, then click on 'manage my mail' you can delete your postmaster redirect. This will stop the duplication.

[#4]

Thanks for the clarification, makes sense now.
stuck