[Mailman-Users] messages fail to @yahoo @aol @outlook

[Bill Cole]

On 28 Jul 2019, at 13:04, Jayson Smith wrote:

> Hi,
>
> The problem I'm familiar with is messages *from* 
> AOL/Hotmail/Yahoo/etc. being rejected by other Email providers.

It happens in both directions. Providers who publish a "p=reject" DMARC 
policy typically also honor other providers' "p=reject" DMARC policies. 
If a mailing list makes any change to messages, it should also either 
munge From or wrap messages to avoid problems. You can do that for all 
messages, only for "p=reject" sender domains, or for both "p=reject" and 
"p=quarantine" domains.

-- 
Bill Cole
bill at scconsult.com or billcole at apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)