Gmail MX over IPv6
cloos at jhcloos.com
Thu Jun 21 21:40:58 CEST 2012
>>>>> "MN" == Mansoor Nathani <jkrolan at mnathani.com> writes:
MN> Since Gmail has enabled AAAA records for some of its MX hosts, my IPv4 only
MN> machine gets the Gmail IPv6 address and attempts to deliver email. Its only
MN> when the timeout has been reached will it try the IPv4 address.
Your log shows that you use postfix.
smtp_address_preference = ipv4
to main.cf to tell postfix to use only ipv4 for outgoing smtp.
The postconf(5) man page explains:
,----< excerpt from postconf(5) >
| smtp_address_preference (default: any)
| The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP client
| will try first, when a destination has IPv6 and IPv4 addresses with
| equal MX preference. This feature has no effect unless the inet_proto‐
| cols setting enables both IPv4 and IPv6. With Postfix 2.8 the default
| is "ipv6".
| This feature is available in Postfix 2.8 and later.
That doc snippit reminds me that you could instead add:
inet_protocols = ipv4
to do the same thing.
James Cloos <cloos at jhcloos.com> OpenPGP: 1024D/ED7DAEA6
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