Now you mention it, a line manager in a previous job years ago called me into a meeting with HR person, it was like he'd cooked up a sting. It transpired that he'd noticed that when I sent him an email, with my 'to do' list, where I was up to on a range of tasks, he'd noticed that I'd also cc'd myself to my Hotmail account.
[I was so fucking tragically dedicated and conscientious, I'd sometimes think of things and revise my 'to do' list on the tram home, because invariably I'd walk out the door and think 'Shit! I need to do xyz!' so I sometimes used to email myself backwards and forwards with tasks. Sad, I know.]
So behind my back and unbeknownst to me, he got the external IT contractors to go through all my emails and he pulled out some others that I'd sent from my work account to my Hotmail account, he'd carried out this investigation, reported to HR, called me into this meeting and he'd clearly worked himself up into this big Gotcha! moment, when he explained he'd seen I'd cc'd my personal email account on my to do list and how he'd then got the IT folks to investigate, and then he started grilling me on 'Why did you send confidential meeting minutes externally to your personal email address?'
You'd think he'd exposed fucking Watergate or something. (He was a former journalist now working in VCSE sector.) I could literally see his hands shaking.
It seemed he'd seen 2+2 and assumed 5, assumed I had some nefarious intentions and was presumably going to leak the minutes... somewhere...? Why? Fuck knows.
I mean, that project was a total shitshow and it was falling apart because the project partners were all disagreeing with one another about who was supposed to be doing what, but that was another issue.
I pointed out that I'd attended the meeting in order to minute it, the time I'd set aside to finalise typing up the minutes had been usurped by something else - oh, yeah, by the fact that I was in a team of three, one of those posts was vacant, and the other colleague was often on sick leave or holiday, so I was often trying to do three jobs and juggling priorities and deadlines...
...and if he'd looked at the time I sent the email to myself, it was probably around 7pm, around the time I got fed up and decided to go home and have dinner and finish doing the minutes later... and if he'd have bothered checking my inbox, as well as my sent mail folder, he'd have seen that I'd emailed the completed/almost completed minutes back to my work email address the following morning, and then I'd emailed them to the project manager.
And I'd done it that way, because I didn't have access to the servers to work remotely (this was just before the pandemic and I ended up working from home anyway), because I was admin and not 'officer' class and I was too lowly at that point to be given remote access to work from home. (Also because their ancient IT systems were a pile of shite and couldn't have coped and they had to be upgraded when the pandemic hit and we all started wfh.)
So having defused that Gotcha! bomb, he moved onto asking me why I'd emailed myself the previous year's departmental SWOT analysis.
A: Because he'd emailed it to everyone in the department as an example and asked us to do one for this year and send it to Colleague X by 5pm on Date Y. But I hadn't managed to do that, because I'd been trying to do the jobs of three people, so I'd emailed it to myself to do at home, thinking I'd email it across first thing. But if he'd also checked my inbox and sent emails, he'd have realised that I was lazy, I'd got home and felt knackered and changed my mind and I didn't do it and email it back to myself. Instead, I did it when I got to the office and emailed my Swot analysis to Colleague X late, at about 10am. And had I mentioned I was knackered because I was trying to do three people's jobs? While he kept calling me into catch up meetings and micromanaging me?
So having defused that Gotcha! bomb, I was then asked why I'd sent myself a regional autism policy document. Well, it's regional policy, it's not confidential, and I'm actually autistic so I was personally interested to see what service provision there was in reality or in the pipeline for autistic adults, because I had a vested interest in that kind of thing. So...?
Honestly, it was like he'd uncovered something big, massive exposé of my wrongdoing and presumed leaking of confidential information. And the reality that was that I was overworked, covering for a vacant post and other staff absence, and I was too conscientious and hard-working and too fucking good for them.
So, yeah, lesson learned that if a fuckwit line manager has nothing better to do with their time than micromanaging his staff and poring through their emails, rather than, y'know, doing the tasks actually required of them...
But thank you. 
