Apparently there is a problem with something called DMARC that big e-mail providers are implementing. I've quoted the e-mail from Brian Behlendorf (who is the man behind hyperreal.org) on the subject.
The big problem is people with yahoo.com e-mail addresses. The way EZMLM works is that it takes your e-mail and resends it to all the list members. Any mail server implementing DMARC rejects e-mails where the FROM: address is [email protected], but it doesn't come from a yahoo mail server. This has resulted in people getting bounce notices from hyperreal. It has happened to me, and I don't even have a yahoo.com e-mail address. Bottom line is the hyperreal team is working on a solution, but this will likely screw up 313 emails for the near term. If you're an e-mail list wizard and can suggest a linux based mailing list server that can circumvent this stupidity, please let me and ( [email protected]) know. ------------------------------------------------------------------------------------------------------------------------------------- If you list is still active and hasn't been swept away by folks moving to Facebook or whatever, you might have heard complaints from yahoo.comusers, or possibly even folks who have started to see strange bounces where yahoo.com senders are involved. This is due to a current hullabaloo about an anti-spam tech called DMARC and Yahoo's recent and strict implementation of it. http://thehackernews.com/2014/04/yahoos-new-dmarc-policy-destroys-every.html DMARC is a system designed to allow domain owners to specify policies and rules regarding how to deal with email from senders using that domain. For example, for an email with a From header like: From: Brian <[email protected]> Yahoo published a policy that says unless that email came from Yahoo's servers, it should be rejected. This is a great anti-spam technique given that lots of spammers use yahoo.com addresses fraudulently (I guess?). But what it means for senders to mailing lists like those we host at Hyperreal, when that mail goes through Hyp and comes back to Yahoo's servers, it bounces. Not only that, but that Yahoo sender's mail bounces at Gmail and other mail service providers who implement DMARC. Those bounces can cause chaos, of course. Ezmlm/qmail will keep track of those bounces and at least let subscribers know they're missing messages and why, and shouldn't unsub those users automatically, but it still causes chaos. More details on technically why this is wrong: http://www.ietf.org/mail-archive/web/ietf/current/msg87153.html Yahoo appears to not get why this is a big deal: http://yahoo.tumblr.com/post/82426971544/an-update-on-our- dmarc-policy-to-protect-our-users There is no good fix here. Changing the From: header to say something like From: Brian Behlendorf via <[email protected]> seems wacky, but it's what Threadable did, specifically for DMARC-checking recipients and DMARC-policy-publishing sender domains: http://blog.threadable.com/how-threadable-solved-the-dmarc-problem Sadly, though, no open source mailing list manager has implemented this well. Mailman seems to have implemented this partially, but no one's even talking about this for ezmlm and I doubt it'll happen. I've not decided whether to move the Hyperreal mailing lists to Mailman or something else, but clearly we need to move off of ezmlm anyways. I was hoping to be able to choose between a couple of them, but now that choice seems much more narrow (and not necessarily the best - Sympa was looking promising too). Anyways - I am sad that this is how things have played out, that I can't provide a quick resolution to this. For now all I can suggest is asking youryahoo.com users to switch to another domain if they want to participate. But that sucks as an answer. If anyone has better ideas (or programming/migration talent to contribute) let me know.
