x@[abcd::dcba] router = r0, transport = t1 host [abcd::dcba] [abcd::dcba] x@[IPv6:cba::abc] router = r0, transport = t1 host [ipv6:cba::abc] [cba::abc] x@[abcd::dcba] router = r3, transport = t1 x@[IPv6:cba::abc] router = r3, transport = t1 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000 250 OK 250 Accepted 250 Accepted 221 myhost.test.ex closing connection