I use two different email applications: Airmail and Spark. I waffled back and forth between them for a while, then finally decided to go with both: one for work, and one for everything else.
I had several criteria for choosing an app:
- It had to support GMail’s keyboard shortcuts. They’re real time-savers!
- It had to support send later functionality. (I was exploring clients before GMail supported send later natively. I experimented with Boomerang and SaneBox, but those can get expensive quickly if you have more than one email account, and I have several.)
- It had to support Exchange — really support it. I’ve groused more than once that an email client that says it supports Exchange, but supports it only if IMAP is enabled, does not, in fact, support Exchange.
I needed these apps so I could do two things: (1) Consolidate as much as possible, to minimize the number of places I need to check email. (2) Separate work and personal accounts so that I’m not tempted to go down the work rabbit-hole when I shouldn’t (academics are notoriously bad about taking time off).
So I use Airmail for my three work accounts (one assigned to me, one for the department I’ve been chairing, and one for an office that I’ve overseen for the past year), which are all GSuite accounts.
Spark is for everything else: a personal GMail account (I got it long enough ago that I had to get an invite for it), a grandfathered Google Apps for Your Domain account (if I ever end up doing anything serious with it I might upgrade to GSuite), and an Exchange account from an organization I’m associated with.
I tried Apple Mail a few times, but I was never satisfied with how it worked with the GMail accounts.
That Airmail and Spark are both available on iOS as well as MacOS provides some consistency across platforms, which I appreciate.