I am using EX2016 and not O365. My question is regards to fetchmail retriving some messages and skipping over others:
I have in fetchmail conf: no keep stated and seems its working mostly (most e-mail get polled), but:
fetchmail: 2 messages (2 seen) for firstname.lastname@example.org at email@example.com
If i send there random mail from myself it arrives nicely, but once over 100 emails 1 gets stuck. (right now there are 2 stuck).
I am using IMAP. Also using Ubuntu 20.04.3 LTS. Also using latest RT and latest Fetchmail.