It seems likely there is significant auditing at FastMail for access. For example, at one time when I asked them to check on why an email wasn't displaying correctly in their client, they asked me to create a folder with a specific name, and put it in that folder[1]. This suggests they have a process to request access to content that logs what is requested, and only displays the content requested.
If you were, as in the tweet, to offer up specific subject lines, they would probably run a search that would only show the employee those subject lines, which you disclosed to them when you offered that information up to them. Not that they were logging into your account and scrolling through your inbox.
I don't consider employees of my mail service accessing my mail on my direct request to help me is a hostile act. I do consider automated reading of my email to profile me[2] on a mass scale to be a hostile act. I probably would not have my email at FastMail if I believed anyone working at FastMail had a vendetta against me, I suppose, but I know for a fact that quite a few Googlers dislike me. :P
[1] I will say I feel like the appropriate way to handle this, which I offered, was to forward them the email in question, since my account was not relevant to the issue.
[2] Note that while Gmail "doesn't use your email for advertising", it does build a Purchases database populated with data from your email in the Account Activity panel, which has literally no justification for existing if they aren't basing ads off of that. So there's a layer of obfuscation there: https://myaccount.google.com/purchases
If you were, as in the tweet, to offer up specific subject lines, they would probably run a search that would only show the employee those subject lines, which you disclosed to them when you offered that information up to them. Not that they were logging into your account and scrolling through your inbox.
I don't consider employees of my mail service accessing my mail on my direct request to help me is a hostile act. I do consider automated reading of my email to profile me[2] on a mass scale to be a hostile act. I probably would not have my email at FastMail if I believed anyone working at FastMail had a vendetta against me, I suppose, but I know for a fact that quite a few Googlers dislike me. :P
[1] I will say I feel like the appropriate way to handle this, which I offered, was to forward them the email in question, since my account was not relevant to the issue.
[2] Note that while Gmail "doesn't use your email for advertising", it does build a Purchases database populated with data from your email in the Account Activity panel, which has literally no justification for existing if they aren't basing ads off of that. So there's a layer of obfuscation there: https://myaccount.google.com/purchases