15 Feb
2024
15 Feb
'24
2:04 p.m.
How many legacy mail clients can handle IPv6?
I would suspect all of them, since MUAs, by definition, are not involved in any mail transport operations. But if you're thinking of MUAs that use Submission, they are unlikely to care one whit what the underlying transport is. You configure a submission hostname, and the client just hands that off to the underlying OS to deal with. It doesn't care what parameters are passed to the connect() call under the hood. As for mail servers handling v6 out of the box, I am not familiar with *any* currently shipping MTA that does NOT do v6 with no configuration required. --lyndon