Around 5 on my personal account, I would say. I have opt-out of all spam/marketing/ad mails and I only receive newsletters or emails for work or other platforms I'm watching like GitHub, Meetup, etc.
On my work account, well I'm constantly getting emails from GH, CircleCI and other platforms we use there. I haven't find a way to filter them based on my team so I just go through them once a day and delete most of them.
In general, my inboxes have 0 emails 90% of the time and the rest I'm just going through them and take actions on them.
I am also using the GTD technique (dansilvestre.com/gtd-gmail/) to tag emails and keep track of what needs to be done.
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