The following typical IPv4 network services are also IPv6 ready:
DNS
HTTP (supported release of Apache or Orion)
LDAP
NFS
sendmail
The IMAP mail service is for IPv4 only.
Nodes that are configured for IPv6 can run IPv4 services. When you turn on IPv6, not all services accept IPv6 connections. Services that have been ported to IPv6 will accept a connection. Services that have not been ported to IPv6 continue to work with the IPv4 portion of the protocol stack.
Some issues can arise after you upgrade services to IPv6. For details, see Problems Encountered When Upgrading Services to Support IPv6 in Troubleshooting Network Administration Issues in Oracle Solaris 11.3.