I had also decided that the issue was with plusnet and that I could live with it since I don't really use the emails anyway (just come every day(yj))

I have recently notived that other mail is being delayed by plusnet though, so I'm about to ask why

Just in case you're unaware: you can disable the email notifications, if you don't want them.

My Controls > Emails & Privacy.

Fourth checkbox from top.

I did know, but thanks anyway
I'm going to use the timings etc to ask plusnet questions

Ha! When I looked the box was checked, but then I realised that the email address is fictitious. Although there may well be some poor bastard @hotmale.com who's getting a lot of confusing email notifications! :$