Bob wrote:

I have it set to "Never send a response" for read receipts.

But for some reason people are still receiving read receipts from me
when ever I read emails in my imap account.

How can I stop this happening?

Read receipts or delivery receipts? The latter is a function of the mail
server and if it's configurable, you would have to configure it on the
server. If read receipts, I can conceive of it being a function of the
server as well, but that's unusual. You could verify if there's a read
receipt in the Outbox by disabling immediate send and then after receiving a
message, using a tool like Outlookspy to see if there's a receipt in the
Outbox.
--
Brian Tillman [MVP-Outlook]