Quote:

> Providing expiration notifications costs Let’s Encrypt tens of thousands of dollars per year, money that we believe can be better spent on other aspects of our infrastructure.

I'm trying to come up with a scenario in my head where sending, let's say, 2M emails per month at scale with an essentially fully automated service infrastructure can cost more than a grand per month. I'm failing to do so.

My calc: SES pricing is around $0.1 per 1,000 emails. LE has around 550M active certificates. Let's say 5% receive an expiration notice (I never got one?), that's just over 2M emails per month on average.

How can that be? Am I missing something?