Subject: Re: Fascists Hate Vote by Mail
... does the US mail service even have the right to decide which mail to deliver and which not to?

No, but when has that ever stopped this president? With some exceptions such illegal materials, certain weapons and drugs, porn, etc. the postmaster (and president) does not have that right: and with the exceptions set by statute, the Constitution leaves elections to the states in "times, places, and manner" of its choosing. Also there are some states, Oregon and Colorado from what I recall, that only use mail for elections.

Pete