So could an email app not be created that could let you manage all eight accounts on all 3 services in one app? Like a sort of dropbox for mail? Or is it something intrinsic in the services themselves that prevents a one-app-fits-all scenario?
All accounts are on all devices. That isn't the problem. CloudMagic can't get its shit together on Android to properly address the notification screen with regularity. Gmail can't be deleted from Android and I'l be damned if I know how to get it to shut the fuck up. Meanwhile, the EFI on the Macbook is more stable with Postbox than with Thunderbird, for some reason, while folder performance is better on the Mac Pro with Thunderbird than Postbox. Neither of these Mozilla forks will talk to MailSteward, which is the best mail database program I've found, which only talks to Mac Mail, which is a bloated pig that can't get out of its own way most of the time. And get this: it doesn't concatenate its queries. And you can't tell it how often to query. So if you've got 5 IMAP accounts on your Hostgator account and Mail decides to check every two minutes, that's 50 queries every 10 minutes. And if you have those same accounts on your iPhone, that's 100 queries every 10 minutes. And if you leave Mac Mail running on the tower while you go to work, that's 150 queries every 10 minutes. And only Mac Mail does this, and when you talk to Hostgator about the fact that your website keeps going down, they say "yeah, Mac Mail is so uncivilized that it effectively DDOSes your own server if you have more than a device or two talking to it. Better switch to something Mozilla. Or, you know, upgrade hosting to the $150 a month package." So on the Mac side, it has to do with the fact that the native app is bullshit and the 3rd party apps are half-assed. I mean, it's not like Mozilla gives a fuck about Thunderbird. Postbox is basically a Thunderbird haxie with not-very-good support but for an extra $10, it works better sometimes. And on the Android side, I get a real Ikea-like vibe - yeah, theoretically you can build Android into behaving like iOS, but the instructions are vague and you're missing a few parts, so you have to go back to the warehouse and fish through bins of picked-over bits to find the right screws to hold your hutch together. And that's how you end up with four different apps (6, if you include the archiving) just to check your goddamn email.
I just disabled notifications, took me a minute to figure it out, but the option is there in the settings. Granted we're probably on two entirely different versions...