On Fri, Mar 13, 2015 at 09:51:59AM +0000, Mike Cardwell wrote:
> I'd like to send a different "smtp_helo_name" depending on if the outgoing
> connection is IPv6 or IPv4. Is this possible in Postfix?
Not at present.
> FWIW, in Exim I would do this by adding something like this to my
> smtp transport:
>
> helo_data = ${if isip4{$sending_ip_address}{my.ipv4.helo}{my.ipv6.helo}}
The smtp_helo_name in Postfix is evaluated long before the connection
to any particular MX host is made.
We'd have to introduce an smtp_helo_name6 parameter that defaults
to smtp_helo_name and use that when connecting to IPv6 hosts.
That hypothetical parameter and associated code do not currently
exist.
--
Viktor.
