On Sat, Sep 7, 2019, at 7:36 PM, paul@arenson.org wrote:

Can ANYONE help? I guess it is bad form to create more threads. But I am losing confidence.

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MAILMAN 2.1.27 (CPANEL

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1. I checked our old list. (I no longer manage it but I have access to the settings)

2. Those settings are: -->Should the Sender header be rewritten for this mailing list to avoid stray bounces? Yes is recommended., Details for include_sender_header

-->Privacy Options Sender rules

-->Action to take when anyone posts to the list from a domain with a DMARC Reject/Quarantine Policy. Munge

--->Shall the above dmarc_moderation_action apply to messages From: domains with DMARC p=quarantine as well as p=reject

Yes

Shall the above dmarc_moderation_action apply to messages From: domains with DMARC p=none as well as p=quarantine and p=reject No

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3. MAILMAN 3 ( Hyperkitty 1.2.2)

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Now i want to make sure that my new list does not encounter problems My settings are

-->Alter

REPLY GOES TO THE LIST is selected

This option controls if the Reply-To header is always changed to the list, instead of letting it be whatever the email came with. This list is configured with "No Munging".

"Reply goes to the list" basically means that if I send an email to the list with "Reply-To" set to my own address ( so that replies are directed to me instead of the MalingList because I don't want people to send replies the list), Mailman will unconditionally change the "Reply-To" header to list's address.

"Reply-To" header is used when for some reason "From" address can't be used by mail clients.

Unless you have a strong reason to change this, the default value is "No Munging".

-->DMARC Mitigations

a) Dmarc mitigation Action replace From: With list address

b) Dmarc Mitigate unconditionally

Now NO. SHOULD I CHANGE THIS TO "Yes"

Let this be the default option, which is "No", unless you have strong reason to do so.

DMARC policies are published per domain, so, some of your senders will have DMARC policy that will cause emails from Mailman to be rejected by receivers. For those senders, Mailman will replace the "From" header to list's address so that DMARC doesn't fail for the receiver.

Doing it unconditionally means that you replace "From" header of every email to the list address.

Can anyone approve or disapprove? Please. I need to make sure this is right BEFORE going live.

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-- thanks, Abhilash Raj (maxking)

Why are you losing confidence? I have seen a lot of your questions answered. When I setup your list for you, I applied the DMARC setting for your list according to best practices and the way we set up lists for our Mailman 2 clients. I believe unconditional dmarc mitigation should be set to no as I believe the mitigation would be applied to those email providers that don't publish a dmarc record. I don't see why everything has to be "perfect" before you can start using your list. Settings can always be adjusted.

Have a great day!

Thank you Brian. I was losing confidence because most but not all questions were answreed, and I have a learning disability that causes me to get messed up with technical detail if I do not understand.

I did not understand the meaning exactly of dmarc and mitigation. Just as your note came in, Abhilash also wrote and now I think I have it. The reason why I like everything to be perfect is that I was afraid of messages disappearing into who knows where.

But now I think I am all set. Appreciate your note!!!

paul