Since recent Thunderbird update 45.6.0 I cannot send to mailing list. When I select a mailing list Thunderbird is creating a single contact with the same name as the mailing list with an invalid email address. Getting this message bbgolf <"Bunker Buddies"> is not a valid e-mail address because it is not of the form user@host. You must correct it before sending the e-mail. The email address it creates is "Bunker Buddies"