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See Features/NoDefaultMTA for an older attempt - the todo list from that feature page is probably still relevant--Mclasen (talk) 18:42, 8 July 2013 (UTC)

Sendmail will be removed from @core. Removal of sendmail from @standard didn't pass. Note: About @standard group might be decided in next release of Fedora. --Jreznik (talk) 12:33, 25 July 2013 (UTC)