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<l...@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
