On 7/10/19 5:36 AM, martin f krafft wrote:
Folks,
I hope this is not too off-topic, but I figure this is the best mailing
list because we're probably not in this boat alone, wherein we're
annoyed (very) and a bit helpless about Google. I have to ask here,
because Google of course doesn't care about us.
We operate several postfix mailservers with hundreds of users, and the
rate at which these users find their emails spamfiled on the side of
Gmail recipients is increasing.
And yet, we're doing everything we can! SPF is configured, DMARC is
configured, DKIM works. And we've even registered the domains and MXs
with Google's Postmaster services, https://postmaster.google.com/.
We get this question on IRC a lot as well, it's a common problem. The
generic answer I always give is this:
If you're having problems getting your mail received by major ESPs you
should first check your fcrdns*, then make sure you have SPF, DKIM and
DMARC configured.** Sign up for the dnswl at http://www.dnswl.org. Also
sign up for ESP-specific programs such as feedback loops, Google
postmaster tools and Microsoft's SNDS. Check the individual postmaster
pages for each ESP that you're having problems with to make sure that
you're in compliance with all of their policies and if you still have
problems contact the support for the ESP. Also check to make sure
you're not on any DNSRBLs and submit removal requests from any you
appear on.***
* http://en.wikipedia.org/wiki/Forward_Confirmed_reverse_DNS: your IP
address should resolve to $myhostname, which in turn should resolve back
to your IP.
** If you just need a DMARC policy to help satisfy ESP recommendations
you can use this to basically tell servers not to enforce DMARC on your
mail: _dmarc.example.com. TXT "v=DMARC1;p=none;adkim=r;aspf=r;pct=0"
*** http://multirbl.valli.org/
... I know that you're at least doing some of these things from your
message, but I would recommend that you go through the above carefully
and do everything listed before you attempt to contact the ESP services
for help.
Peter
