Does anyone from Florida know if this is accurate?
Yes, they supplied prepaid envelopes with the ballots. The Post Office does not usually postmark such envelopes. They told the Post Office that they should be sure to postmark these envelopes, but you know what the Post Office is like - word doesn’t always get down to the bottom-level workers. About 95% of the disqualified ballots had no postmark, but I believe they counted the ones that arrived by election day whether they had a postmark or not, since they were obviously mailed in time.
I have been arguing for weeks about the fact that prepaid postage doesn’t get ANY KIND of ISPS postmark.
Even when something does get a postmark, it is very faint.