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I guess nowadays that should still be useful to give both an IPv4 and IPv6 address for the mail server?
by Natsu 6y ago
I guess nowadays that should still be useful to give both an IPv4 and IPv6 address for the mail server?
- deleted 6y ago[deleted]
- aussiegeek 6y agoYep, just have A and AAAA records for the hostname the MX points to
- herpderperator 6y agoWhy? You can just make mail.example.com resolve to two IPs: an IPv4 and IPv6 address. Nothing wrong with that.
- remram 6y agoIsn't that what Natsu said?
- herpderperator 6y agoNo. If you read the top-level comment, it sounds like the response directly indicates that these days it would be useful to use the defunct multiple classes (IN vs CH) functionality to instead reference different IP types (v4 or v6) in today's Internet, hence "nowadays". That isn't needed because we can already mix v4 and v6 records within the IN class itself through A/AAAA records. If I misunderstood the comment, then my bad.
- Natsu 6y agoI see, I haven't had to dig too deep into DNS so it wasn't obvious to me that those were separated like that. I guess, then, that it's only useful to allow us to someday upgrade to some post-TCP/IP world if there's ever a reason for that.