On Thu, 12 Sep 2019 at 10:40, Ignacio García <[email protected]> wrote: > > El 11/09/2019 a las 14:55, Matus UHLAR - fantomas escribió: > > On 11.09.19 13:28, Ignacio García wrote: > >> We have our servers IPs at OVH IP address-space and from time to > >> time, when we send emails to a small, particular set of > >> very-well-known domains owned by one very large corporation, there > >> are periods where our customer's emails go, by default, to the SPAM > >> folder no-matter-what. > > > > the best solution for this is to configure sender protection via spf/dkim > > records, and when possible, using IP addresses not listed in any > > blacklists. > > > Of course, our systems use spf, dkim, dmarc, srs, dns and rdns in order > and not in any known blacklist. we enforce sending limits to all our > users and we do not host mailing lists or bulletins. However, from time > to time all messages sent from some domains we host (not all domains) in > the same IP go filtered to SPAM. > > In any case, and although I know this may be out of the scope for this > list, could anybody be so kind and check tere's trouble anywhere with > this domain? > > gestoriagp.com > 94.23.19.133 > > Thanks very much in advance
The ip address is listed at dnsbl.spfbl.net with code 127.0.0.4
