kj.park Asked: 2014-02-12 22:17:55 +0800 CST2014-02-12 22:17:55 +0800 CST 2014-02-12 22:17:55 +0800 CST Google gmail block for no ptr of 4to6 ip address 772 When mail server got only ipv4 address and enabled 4to6 interface, gmail server block mail because of no ptr record of 4to6 address. Why...? Isn't 4to6 address not global standard...? gmail 1 Answers Voted David Schwartz 2014-02-12T23:14:14+08:002014-02-12T23:14:14+08:00 4to6 is a way to allow IPv4-only machines to access IPv6-only content. It's wholly inappropriate for a mail server to use.
4to6 is a way to allow IPv4-only machines to access IPv6-only content. It's wholly inappropriate for a mail server to use.