Summary: email sent by users with mailboxes held by yahoo may have their email disappear.
This may be mail to a mail list (such as this one) their mail list postings may not be received by other yahoo users and also gmail users & a few others.
Yahoo made changes without warning and have caused a huge on-line discussion by mailing list operators.
Yahoo broke email lists.
This is because at the start of the week Yahoo changed their DMARC settings to ask servers that receive a message with a yahoo.com email address in the From: line to reject it if it isn't properly signed by yahoo, which all messages they send will be.
Basically, Yahoo has said that it users are not supposed to use any mailing list configured in the manner that they are often configured in.
There are several possible workarounds, but none of them satisfactory. Discussion continues.
See:
On Sun, Apr 13, 2014 at 11:21 PM, Alain Williams addw@phcomp.co.uk wrote:
Summary: email sent by users with mailboxes held by yahoo may have their email disappear.
This may be mail to a mail list (such as this one) their mail list postings may not be received by other yahoo users and also gmail users & a few others.
Yahoo made changes without warning and have caused a huge on-line discussion by mailing list operators.
Yahoo broke email lists.
This is because at the start of the week Yahoo changed their DMARC settings to ask servers that receive a message with a yahoo.com email address in the From: line to reject it if it isn't properly signed by yahoo, which all messages they send will be.
well, that's fine. basically what will happen is that anyone using a yahoo email address will find that they:
a) don't receive messages b) can't subscribe online because the mailing list subscription system doesn't work c) don't receive the acknowledgement even if they use a web address to subscribe
sooo... what will happen is that people will simply... not use yahoo, because it no longer works. last week, i wondered why my partner couldn't receive an email from a mailing list subscription system (business related) when we tried to register online. now i know why.
Basically, Yahoo has said that it users are not supposed to use any mailing list configured in the manner that they are often configured in.
There are several possible workarounds, but none of them satisfactory.
http://www.dmarc.org/faq.html#s_3
what a complete load of tosh. mailing lists are required to significantly modify messages, changing for example the "from" field to that of the mailing list, then use one of the rubbish methods that we know already fail to provide any kind of checks.
i love the way they say "DMARC was invented because you never know what other methods people will use - SPF or DKIM".
well... now there's *three* possible methods that people won't use... great! :)
thanks for the entertainment and the heads-up alain.
l.
Luke Kenneth Casson Leighton <lkcl <at> lkcl.net> writes:
Yahoo broke email lists.
Now hold on a sec...
This is because at the start of the week Yahoo changed their DMARC settings to ask servers that receive a message with a yahoo.com email address in the From:line to reject it if it isn't properly signed by yahoo, which all messages they send will be.
There are several possible workarounds, but none of them satisfactory.
But I don't WANT another person to spoof my mail address. Why should a mailing list be any different?
i love the way they say "DMARC was invented because you never know what other methods people will use - SPF or DKIM".
well... now there's *three* possible methods that people won't use...
great! :)
No, DMARC points at one/both of the other two. It's not a parallel.
I mean, sure, it breaks lists. But the lists were already broken, and yahoo is just saying "we want it done right." It would be unfortunate if they lose people because of doing the right thing, technically.
Is it so hard to change from to the address of the mailing list (which the email REALLY IS FROM, and set the reply-to: to the original author? That sounds like the right thing, to me.
This email sent from gmane, which is going to LIE TO EVERYONE and claim I mailed it.
I mean, sure, it breaks lists. But the lists were already broken, and yahoo is just saying "we want it done right." It would be unfortunate if they lose people because of doing the right thing, technically.
It's only "the right thing" for point-to-point email. No mailing-lists, no email forwarding, etc...
Is it so hard to change from to the address of the mailing list (which the email REALLY IS FROM, and set the reply-to: to the original author? That sounds like the right thing, to me.
A very common use of a mailing-list is an an SMTP implementation of a forum. Last I checked, forums don't send messages, only their members do. So no, the message is really not coming from the mailing-list.
So yes, it's easy to do, but it's wrong.
Stefan
arm-netbook@lists.phcomp.co.uk
-
Alain Williams -
Derek LaHousse -
Luke Kenneth Casson Leighton -
Stefan Monnier