I first encountered the term “blast email” a week ago in my book club, now again today in a blog I’ve been reading daily for years. Google hits refer to it as a marketing tool—an identical email sent to many many addressees—and indicate that it’s falling out of favor [“too spammy”]. In both book club & blog, they referenced use by private citizens: the host sends a blast to the other book club members, a citizen sends a blast to her state and fed representatives. Is the term now “mainstream”? Have you heard it?

Never have heard it. I've only known it as "multiple recipients."

Not heard it but I'd have easily guessed the meaning.

I hear it all the time - we send out blast emails, often referred to as "e-blasts," to alert people about changes or updates. I thought it was in common usage, but I guess not.

Kalleh, I'll bet it's common in the work world. My husband knew it. I travel to various PreK's, & it's its own bubble. I've noticed staff tend to be less digitally oriented. Screen-time is frowned on at that age, so there are no laptops in classrooms [nor teacher's desks to set them on]. Also, no need for director to communicate with staff via smartphone; every room in a school has an in-house phone, plus there's a PA system.