On Fri, 24 Nov 2017 08:23:21 -0700 Dave wrote: > >> It mostly shouldn't, but when I was supporting a mail server that > >> included a SpamAssassin integration, we ran into a non-zero number > >> of installations where DNS checks failed and they fell back on > >> direct connections. > > > > I don't follow that. sa-update needs the result of the dns lookup to > > construct the download URL. > > My recollection is that something was eating the TXT results; but not > the A records.
But it's the version number in the TXT result that determines the names of the files to download. If it's not available the channel is supposed to be skipped.