[Mailman-Users] gmail

Robert Heller heller at deepsoft.com
Wed Sep 12 10:18:39 EDT 2018

At Tue, 11 Sep 2018 10:04:58 -0400 "Bernie Cosell" <bernie at fantasyfarm.com> wrote:

> I've gotten buried by 80 bounce messages, thanks to gmail's new policy [that was, 
> apparently, put into effect yesterday].  The bounces say:
> <.... at gmail.com>: host alt1.gmail-smtp-in.l.google.com[] 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. 128-v6si11952705iti.109 - gsmtp (in reply to end of
> DATA command)
> I looked at their 'answer' and mostly found it to be unhelpful.  i certainly can't get 
> any server anywhere to change their their system configuration, nor can I mess 
> with mailman [all suggestions about python-esque tweaks to mailman presume 
> that you have access to the server, which I don't].   Is there something I can do 
> [just as a list owner] to deal with this mess?

There is nothing you can do as a "list owner".  You will have to talk to your 
server's admin.  "He/She/They" *have* to implement *at least* SPF and DKIM.  
ALL legit outbound mail servers *have* to implement *at least* SPF and DKIM.

If your server's admin can't / won't do this, your only other option is to 
move your list to a different server.

>   /Bernie\_
>                  Bernie Cosell
>          bernie at fantasyfarm.com
> -- Too many people; too few sheep --
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Robert Heller             -- 978-544-6933
Deepwoods Software        -- Custom Software Services
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