Why do you think this is real?
Please provide a single example of actual fraud, not hearsay or something someone thinks was 'not right' for some unspecified reason.
The White House released detailed info on actual cases of fraud, involving any kind of fraudulent activity relating to any kind of voting, not just postal voting. Over several decades there have been a little over 1,000 cases, involving small numbers of votes. This is evidence, these are things that actually happened. That is the limit of evidence offered.
Do you have something else? What would be a case other than those mentioned in which actual fraud was committed? Do you have a reason for taking a collection of allegations without evidence to be the same thing as actual evidence? If so, why?