I have just checked how much it uses on my side: doesn't go above 50%, but I do consider that pretty high and can totally understand how it could use 100% with

I have just checked how much it uses on my side: doesn't go above 50%, but I do consider that pretty high and can totally understand how it could use 100% with bigger mailboxes. For me, this was never a problem since I only run it once daily for backup. Thank you for mentioning mbsync, I will keep it in mind.