"Sent Mail" filled with "no recipient"
So for some reason, suddenly my "sent mail" folder on my iPhone is filled with emails that are titled as "no recipient." These emails consist of notes, calendar entries, stuff I've typed to website emails, all kinds of other random stuff too that I can't explain... and many of the emails are redundant, which concerns me because it's as if the email was sent out to multiple people.
I use a google mail account.
The settings are configured to NOT sync my notes with gmail.
The settings are configured to NOT sync my calendar with gmail.
The settings are configured to NOT save deleted messages in my "All Mail" folder.
I'm seeing all kinds of random stuff from years and years ago sent as emails multiple times to "no recipient."
Please help! I'm concerned that sensative information is being emailed to people, and that incorrect stuff is being emailed to people.