Court allows blocking of emails by Public University
This article details a ruling by the 5th U.S. Court of Appeals that finds the University of Texas did not violate any laws (constitutional or otherwise) by blocking what they deemed junk mail from an online dating service. It sounds as though one of the arguments was a 1st amendment (freedom of speech) violation.
What I do find interesting about this is it IS a state University and so the 1st amendment argument could be applied interestingly with any government funded institution. It obviously has no bearing on businesses blocking any mail they please. (The 1st amendment says that “Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.”) The article notes that the court did not rule whether the schools computers were Public or Private.
I think you’d have to work very hard to argue that it was a violation of free speech according to the text above.