The commission recommended the Town Council give Logan a formal reprimand.
The council on Wednesday night voted unanimously to accept the Ethics Commission ruling.
After the vote, Mills asked when the council would talk about what Logan's reprimand would be and whether that discussion would be in closed session.
Murphy said the action to accept the Ethics Commission's ruling was the reprimand, and that a copy of the commission's decision will be placed in Logan's file.
Before the vote Wednesday night, Hancock resident Frank Courtney asked the council to dismiss Logan as manager.
Courtney, who ran for Town Council in the election, also was mentioned in Logan's Jan. 25 letter.
Logan claimed in the letter that Mills and Courtney harassed two town employees shortly before the election.
Courtney and Mills have said publicly several times, including at town meetings, that the claim was untrue.
Hancock resident Sinclair Hamilton said Wednesday that Logan's actions didn't warrant spending tax dollars on an Ethics Commission review.
Murphy said the town spent money on legal fees so the matter could be heard by the ethics commission.
Logan wrote in the letter that he could never work for Mills and that the town would be looking for a new manager if Mills were elected mayor.
Mills lost to Murphy by 44 votes.
Logan's letter followed comments made by Mills in a Jan. 25 story in The Herald-Mail about the town issuing untaxed benefits checks to several employees who had opted out of Hancock's health insurance program.