The Senate must receive and count the votes received from the states. Period. Nothing in the Constitution, either in Article I or the 12th Amendment, say that the Senate decides which are valid and which are not. Objections can be filed, but it takes at least one senator and one congressman to file it and both Houses must approve the objection. That's the only way the proceedings can be halted, and the chance of that happening in a Democrat-controlled Congress hovers between zilch and none.
I was not forecasting any probabilities merely describing the facts. Congress has in the past declared slates of electors invalid so it is not impossible. By the end of a month the Blagoavitch scandel may have sunk more than we know.