Nice to hear.
What would be even nicer would be to read a technical forensic report that demonstrates Wordfly's beliefs are justified.
But I doubt they have the expertise to do that, or the money to hire an expert to do it, or the will to go through the expense.
WordFly is a mass-mailing system. Probably maintained by one guy, remotely.
He's not going to waste his time on this and he doesn't have the necessary experience to handle it. Plus he probably has no clue as to what needs to be done to avoid a repeat of this issue.
He'll just continue business as usual, and keep pocketing whatever he can bill.