Posted in Internet Slang DUFNACIML stands for Don’t Use Freakin’ Non-Ascii Characters In Mailing Lists DUFNACIML Share Pinterest Tweet Whatsapp Post navigation DUFMCDUFP Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.