exchange 2007 on windows 2008
user client outlook 2010
UserA is sending a read receipt to UserB, every few minutes, lasting for who knows how long.
UserB set up a rule to remove it to deleted items and empty deleted items folder every day.
I tried on userA's outllok enable the 'never send a read receipt', but did not work.
I can created a Hub rule to stop it using " from usera to userb drop it by subject"
does any one know why this is happening and is there a way to stop it using something else instead of applying a rule on HUB server?