More importantly they give any government agency free access without any warrant to fulltext search any customer.
US law interpretation of IMAP. Only with a POP3 service you are safe.
US law interpretation of IMAP. Only with a POP3 service you are safe.
Retrieving email via the POP3 protocol typically deletes the email upon retrieval, making it impossible for the third party to comply with requests for already-retrieved emails.
What POP3 client are you using that does this? I've not seen it before. It gets marked as read but that's it.
It used to delete from the server after downloading locally. This was when most email mailboxes had a capacity of 10MB.