[Mailman-Users] Messages delivered out of order and delayed

[Mark Sapiro]

On 9/13/19 5:32 PM, Veronica Morris wrote:
> Thanks all for the help!  I submitted a ticket with DreamHost, and below is
> their reply.  I am hoping it makes a difference!


It's typical of Nightmare er.. Dream Host.


> Hello Veronica,
> 
> Thanks for contacting DreamHost!
> 
> Looking into this for you, it looks like Google is rate-limiting the
> emails, due to the emails not being authenticated (due to it being a
> discussion list).

DreamHost should be DKIM signing outgoing mail from your domain. The
mail being from a 'discussion list' has nothing to do with it. There's
no reason why they can't do this other than they just don't want to.

...
> Sep 13 13:34:01 pdx1-mailman02 postfix/smtp[19918]: A5E3A4C585D:
> to=<veronica.m.psdp at gmail.com>,
> relay=alt1.gmail-smtp-in.l.google.com[173.194.192.26]:25, delay=2380,
> delays=2377/2/0.67/0.43, dsn=4.7.0, status=deferred (host
> alt1.gmail-smtp-in.l.google.com[173.194.192.26] said: 421-4.7.0 This
> message does not have authentication information or fails to pass
> 421-4.7.0 authentication checks. To best protect our users from spam, the
> 421-4.7.0 message has been blocked. Please visit 421-4.7.0
> https://support.google.com/mail/answer/81126#authentication for more 421
> 4.7.0 information. c6si35691047iok.161 - gsmtp (in reply to end of DATA
> command))
> 
> To help with this, I have created a SPF for your domain. Please allow for
> up to 4 hours for DNS propagation and to see if that does make a
> difference. If there is anything else you need help with, please let me
> know! Thanks! Have a great day!


The SPF may help, but the mail should also be DKIM signed.  Also,
without seeing the complete raw message headers as received from the
list (when viewing a message in the Gmail web UI, click the 'more' icon
- 3 vertical dots - and 'show original') I can't be sure, but there may
be DNS issues. I.e., the IP address for list.psychdogpartners.org is
64.90.62.213, but a reverse lookup of that IP points to
listserver-moon.dreamhost.com.

DreamHost should be doing all the right things by default, but it
appears they may not be.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan