But now there is another problem. I can not connect to 1:120/544 using the information in the nodelist.
1:120/544 is listed with host name ftn.rocasa.net. That resolves to
2604:9980:0:12b::1cac:78d8 and 198.37.105.146
1:120/545 is listed with host name ftn.rocasa.com. That resolves to
2604:9980:0:12b::1cac:78d8 and 198.37.102.11
So 1:120/544 and 1:120/545 have the same IPv6 address. 2604:9980:0:12b::1cac:78d8 only connects to 1:120.545 however. So to connect to 1:120/544 sysops should force their mailer to connect via IPv4.
You need to remove the AAAA record for ftn.rocasa.net, or replace it with the proper AAAA record for 1:120/544.