On Sat, Aug 16, 2014 at 5:18 PM, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote: [...] > >> inet_protocols = all > > Set this to ipv4, you don't have ipv6 connectivity.
I wouldn't be so hasty, Viktor. It looks like he is routing IPv6, as does Comcast (I know that from personal experience): Aug 16 13:38:13 RichCookHomeMac postfix/smtp[48905]: connect to smtp.comcast.net[2001:558:fe2d:70::30]:25: No route to host Aug 16 13:38:43 RichCookHomeMac postfix/smtp[48905]: connect to smtp.comcast.net[76.96.40.155]:25: Operation timed out Wrong port, but he's getting the AAAA lookup for smtp.comcast.net, and then postfix is falling back to ipv4, Shockingly, in most of the country, Comcast will give a /64 to anyone who wants it. % host -t mx smtp.comcast.net smtp.comcast.net is an alias for smtp.g.comcast.net. % host smtp.g.comcast.net smtp.g.comcast.net has address 68.87.26.155 smtp.g.comcast.net has IPv6 address 2001:558:fe14:70::30
