In theory Multi-VA [letsencrypt.org] should still prevent getting a TLS certificate
Yeah, that's why I only said plausibly, rather than possibly, as it'd take that 1:20 shot to make it happen. But plausibly may be overstating it a bit, still.
Any certificates from LE would also appear in the certificate transparency log that currently only has EnTrust and DigiCert certificates. A few hundred pages' worth of certificates.
Given everything we've learned here, do you think they're actually monitoring CT logs? Or hiring a brand reputation service to do it for them? I would bet a lot of money on the answer to that question being no. As you said, asleep at the switch
organizations which support email exchanges with the Internet are encouraged to support AT LEAST each mailbox name for which the associated function exists within the organization.
Emphasis mine.
Take care of the luxuries and the necessities will take care of themselves. -- Lazarus Long