In regard to: Re: [OpenIndiana-discuss] "Discussion list for OpenIndiana",...:
[email protected] posts to the list. The mailing list package forwards
the post to all the subscribers. Everyone on the list EXCEPT the
subscribers using yahoo.com will see the post. yahoo.com will reject
the message as a forgery, so no one using yahoo.com will see the
message. It's not clear to me if [email protected] will be unsubscribed
because of the bounces or just [email protected]. It seems likely that a
malicious person could unsubscribe all yahoo users from a list by
creating a yahoo account and posting to the list a bunch of times.
The part you missed is that other domains that honor DMARC, which includes
at least Google and AOL, will *also* reject mail from sender@yahoo. This
bounce comes back to the list bounce address or list owner, and if the
mailing list software is configured so that N bounces = dropped from the
list, then the [email protected] will *also* be dropped.
Basically, any user *receiving* email at a domain that honors DMARC will
generate a bounce whenever a yahoo or AOL user (or any domain with
p=reject for DMARC) sends mail to the list. That's why several of the
recommendations from experts have been to not allow yahoo & AOL users
to *post* to the list. They can receive just fine; it's the "poison"
nature of their posts, because of the p=reject, that causes problems
for *all* DMARC-enabled recipients.
Tim
--------------------------------------------
On Thu, 5/15/14, Discussion list for OpenIndiana
<[email protected]> wrote:
Subject: Re: [OpenIndiana-discuss] "Discussion list for OpenIndiana"
To: [email protected]
Date: Thursday, May 15, 2014, 1:56 PM
Sorry, but you misread: I
am asking about other *mailing lists*.
They, the *mailing lists*, are receiving email
from @Yahoo users.
How?
On 15/05/2014 19:17, Discussion list for
OpenIndiana wrote:
> [email protected]
doesn't get any posts from other yahoo users. After
a
> certain number of bounced emails,
[email protected]
gets
> automatically removed from the
mailing list.
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Tim Mooney [email protected]
Enterprise Computing & Infrastructure 701-231-1076 (Voice)
Room 242-J6, Quentin Burdick Building 701-231-8541 (Fax)
North Dakota State University, Fargo, ND 58105-5164
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