Is smtp mail ever likely to switch to IPV6?
Switch? I don't know. Certainly the IPv4 address space can stand
holding everyone's mailserver a lot easier than it can stand holding
all of everyone's hosts. :-)
But I do know that my mailserver was accepting mail over v6 until my v6
connectivity broke a year ago (my upstream's upstream went poof, and,
while they and I have renumbered, they haven't yet found another
upstream - I suspect it's just low priority for them, being in North
America and all). And by "accepting mail" I mean "actually receiving
mail", not "being prepared to receive mail".
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