[MM3-users] Re: Disabled by bounce

Thank you, Mark. By

"However, all of the above can be avoided without any DMARC changes by enabling bounce probes."

Do you mean that I can get rid of the 'From' mangling, which has been a frequent source of embarrassment because the list address is captured and reused by type-ahead when sending non-list messages and those messages instead going to 1000 subscribers.

__

Allan

On 2/1/23, 09:59, "Mark Sapiro" <mark@msapiro.net> wrote:

On 1/31/23 22:32, Allan Hansen wrote:
> Hi all,
> 
> Apparently Google just started to get very aggressive about DKIM settings. Some hundreds of my subscribers have had their subscriptions disabled because of Google's bounces.
> 
> I tried to 'Enable' some of them, expecting that their bounce scores would be reset, but when I list the users, the bounce scores are still 5.
> 
> Please advise. Will enabling them without the bounce score being reset just cause the server to disable them again.


Yes, Google has started enforcing a policy which is effectively DMARC 
p=reject even for senders whose domains don't publish DMARC p=reject or 
quarantine.

To avoid this issue, you may need to set DMARC Mitigate unconditionally 
to Yes as well as DMARC mitigation action to Replace From: with list 
address if it isn't already.

As far as enabling without resetting the bounce score is concerned, I 
think you are correct that they will just be disabled again on the next 
bounce. This is a bug and should be fixed.

However, all of the above can be avoided without any DMARC changes by 
enabling bounce probes. in the [mta] section of mailman.cfg, set
```
verp_probes: yes
```
Since the probe is sent From: the list's domain, it should pass googles 
SPF and DKIM checks and not bounce.

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

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