mail and IPv6, not The Reg does 240/4

Thu Feb 15 13:24:48 UTC 2024

Tom,

The solution is easy, just have a dual-stack MX record.

$ host gmail-smtp-in.l.google.com.
gmail-smtp-in.l.google.com has address 172.253.115.26
gmail-smtp-in.l.google.com has IPv6 address 2607:f8b0:4004:c06::1a

Servers using IPv6 connect to IPv6 as needed.

Matthew

On 2/14/2024 9:26 PM, John Levine wrote:
> It appears that Stephen Satchell<list at satchell.net>  said:
>> On 2/14/24 4:23 PM, Tom Samplonius wrote:
>>> The best option is what is happening right now:  you can’t get new IPv4
>>> addresses, so you have to either buy them, or use IPv6.  The free market
>>>    is solving the problem right now.  Another solution isn’t needed.
>> Really?  How many mail servers are up on IPv6?  How many legacy mail
>> clients can handle IPv6?  How many MTA software packages can handle IPv6
>> tod
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