What legal liability? A lot of people especially here in the US are always invoking liability. What series of legal events do you imagine being initiated by the posting of this email?
Overall it's just very hard in the US to sue someone for telling the truth about how awful you are.
“A dentist can only sue you for a bad review if the statements are untrue” and
“Overall it's just very hard in the US to sue someone for telling the truth about how awful you are.”
https://fclawyers.com.au/checking-facts-before-you-write-rev...
Or am I mistaken about US law? I think it is even worse over there, you can basically write what you want, as long as nobody can prove it outright wrong. Just imagine all the New York Post articles somebody would be sued for.
Most outright defamatory articles just end in a "Welp, sorry?"-situation and nothing ever happens, because "It could have been true, right?"