I tried this, which works but doesn't create a unique card title: I used MS Word to perform a mail merge to send to the email-to-board email. It created the cards just fine but because you can't personalize subject lines using Word (unless you use some complicated add-ons), the card title came out the same for all of them.
The above solution can create unique card titles, I'm not sure if other columns are also imported.
There are a few add-ons and apps that can do a Trello import if you want to invest a little time/money.
If you had to thrive a new habit during a lockdown, what would it be? Trello
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