Mayor Eric Adams reminded city workers this week “not to accept gifts and favors” — raising eyebrows as he stands accused of illegally doing just that.Municipal employees are not allowed to accept gifts or “tips” for doing their jobs, gifts from their subordinates that exceed $10 or offers and free attendance to holiday parties or sponsored events from entities they’re doing business with outside the city, per the memo, shared with The Post by a city Department of Education staffer.The email, from Adams, the city Department of Investigation and the Conflicts of Interest Board, usually goes out with similar wording to all city staffers annually around the holiday season.But for some, the missive read more like an April Fool’s joke or article from satirical site “The Onion” — in light of the mayor’s historic indictment in September accusing him of accepting bribes in the form of luxury travel in exchange for doing favors for foreign governments. “The fact that he, along with a majority of his cabinet, is either going to be indicted or has resigned for alleged criminal acts and then he has the audacity to remind teachers not to accept a gift, because of ethical impropriety, is just the Gods of irony at work,” Forest Hills High School teacher Adam Bergstein told The PostOthers found the email less amusing.“I’m still fuming over his (Adams’) nerve to school me on the ethics and legalities of accepting holiday gifts and favors,” said another city educator, who asked to remain anonymous.The email struck a particular nerve with year another teacher — who pointed to it as a reason the mayor should be stripped of his control over the country’s largest public school system.According to city rules, public school teachers are limited to accepting gifts worth $50 or less over a 12-month period.This limit applies to any presents of value, including meals, event tickets and gift cards.Some exceptions to the rule include:New York City also...