On 11/12/15 21:22, Robert Steinmetz AIA wrote:
> Any email to a gmail server is rejected with a 550-5.7.1 error,
> basically requiring a ipv6 ptr record.
[...]
> Unfortunately our IP addresses are provided by our ISPs and
> they don't provide ipv6 ptr records.
That's your basic problem; go beat up your ISP or move to a better one -
because, big-G will proceed in the future to apply the same constraints
to ipv4. My prediction; I have no special knowledge. But
"we're the phone company; we don't have to care".
> Is there a comparable method for exim4? Or some other way of overcoming
> the problem?
One way:
dns_ipv4_lookup
domain list; lookup only A-records for these domains, not AAAA also.
eg:
dns_ipv4_lookup = gmail.co
(of course, subject to G moving their MX's around).
http://exim.org/exim-html-current/doc/html/spec_html/ch-main_configuration.html
--
Cheers,
Jeremy
