I recently started getting bounces on my lists for ALL of my
subscribers who use Yahoo.com as their email provider:
Last error: 5.7.9 554 5.7.9 Message not accepted for policy
reasons. See http://postmaster.yahoo.com/errors/postmaster-28.html
When I asked my local Listserv postmaster about this, they sent me
back the reply appended to the bottom. My question is: is
EVERYONE who owns Listserv lists having this problem?
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Howdy,
On April 8 Yahoo implemented a new policy that blocks messages from
lists not hosted by Yahoo or Google. The idea is to only allow
messages which comply to a certain security standard to prevent
phishing scams and other forms of email abuse. The immediate problem
with this policy is that all universities running Listserv are
affected and there is little we can do about it. Note that all
domains hosted by Yahoo are affected which includes email addresses
from ISP's such as Comcast and AT&T.
The only current solution is to unsubscribe @yahoo addresses from
your lists and send them an email explaining why they are being
removed and prompt them to subscribe with an alternative email
address. While this is not ideal, this is going to be the solution
unless Yahoo rolls back this decision.
I hope that clears up the confusion over what is happening. If you
have any more questions please let us know as we are always glad to
help. Have a great day!