Fernando Gozalo:
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> Hi,
>
> >>>>>> does the postfix smtp client implement the IPv6 to IPv4 fallback
> >>>>>> mechanism as browsers do?
> >>>>>
> >>>>> Postfix implements the MX fallback strategy as defined in the SMTP
> >>>>> RFC (5321). In addition, Postfix implements this:
> >>>>>
> >>>>> smtp_address_preference (default: any)
> >>>>> The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP
> >>>>> client
...
> >> $ postconf smtp_address_preference
> >> smtp_address_preference = ipv6
> >
> > RTFM (see above) or upgrade.
>
> Sure I have a problem with the idiom, but I'm trying to understand the
> paragraph above. Why trying first IPv6 implies IPv4 is not going to be
Please, set smtp_address_preference=any, or upgrade to a Postfix
release 2.9 or later.
Wietse
