Normal emails. I understand the situation with ISP mail servers but have had little problem with PlusNet in the past 12 years. However, as I am about to leave PlusNet shortly to allow me to get FTTP at a reasonable price I will be migrating to an independent supplier probably starting on that tomorrow.
Sounds as if you're using POP3 and relying on UIDL which has become problematic in large POP3 clusters. Using a different email platform from your ISP is always a good move.
FTTP sounds nice, which ISP are you going with?
plusnet unlimited fibre - 2 Jun 14 - 470m - 80/20 - Summer/dry sync 55/9.4, Winter/wet sync 52/9.1
15 years broadband (1999 ntl:cable trial) - Asus RT-AC68U with HG612 - BQM - Summer PN speed - Winter PN speed