I take it you're asking how many accounts we have that we use routinely, not merely how many valid email accounts we have but
don't use. Well, that depends on what day of the week you ask.
Just recently I moved my primary service to FastMail, hosting 2 domains there and having a number of aliases (using FM's own domains). I use
my domains (one address with each domain) for friends & family, and use one of my FM addresses/aliases for 'junk' (shopping, message boards, newsletter sign-ups, etc.), keeping the others in case I get too much spam and have to replace it.
I also recently re-opened a Google Apps account with one of the domains FM hosts for those days I prefer using Google's webmail interface. (Since Apps can POP and send without MX records being pointed to it, it works great as an alternate client. Perfect for those like me with short attentions spans.
)
But I don't use GApps for back-up. I have an account with PolarisMail to which I auto-forward all mail coming to FM -- for backup purposes.
I also have about 5 valid but unused accounts (Lavabit, Gmail, Hotmail, Yahoo, Hushmail -- I'm waiting for Hushmail's new interface and upgrades before making more use of that service).
So, all that translates to: 5 unused accounts, four active
addresses, 3 active
accounts, two hosted
domains...... and a partridge in a pear tree. :rofl: