Hi Wietse, That is to say it must work with a second instance of POSTFIX?
Let say that it will use IPV6 as default for outgoing smtp and a fallback on the same host that will use IPV4. Correct? Franck MAHE ------------------------------------------- -----Message d'origine----- De : owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] De la part de Wietse Venema Envoyé : samedi 25 mars 2017 15:44 À : Postfix users <postfix-users@postfix.org> Objet : Re: Fallback to IPV4 in case of IPV6 is not available Postfix can be configured to try IPv6 before IPv4 (with smtp_address_preference), but that feature is independent from routing features such as transport_maps, smtp_fallback_relay, and so on. That is, there are no ipv6_transport_maps or ipv4_smtp_fallback_relay features. I suggest you just keep sending mail via the IPv4 smarthost. Wietse
