Last week it was Xtra blocking outbound mail at reception. This week any message having a Xtra or Yahoo address in the From header is being rejected upon receipt from our listserver, despite the listserver using its own address in the envelope & in the Sender header. When I follow the URL in the quoted SMTP responses, it turns out that Yahoo think I should change my listserver so that the senders address does not appear in the From header. Which sucks, because we already put the listserver's own address in the Sender header (which most mail clients will then render as "From knitting circle on behalf of Jane Smith"), and as far as I know, we're following the RFCs to the letter. So have I missed something in the RFCs that permits Yahoo to do this? They're essentially saying "we don't permit our subscribers to subscribe to mailing lists unless the mailing list is deliberately broken". -Martin
Is this happening for all senders, or just some?
If it's only some, it's possibly DMARC-based.
Scott
On Mon, Jul 28, 2014 at 7:14 PM, Martin Kealey
Last week it was Xtra blocking outbound mail at reception.
This week any message having a Xtra or Yahoo address in the From header is being rejected upon receipt from our listserver, despite the listserver using its own address in the envelope & in the Sender header.
When I follow the URL in the quoted SMTP responses, it turns out that Yahoo think I should change my listserver so that the senders address does not appear in the From header. Which sucks, because we already put the listserver's own address in the Sender header (which most mail clients will then render as "From knitting circle on behalf of Jane Smith"), and as far as I know, we're following the RFCs to the letter.
So have I missed something in the RFCs that permits Yahoo to do this? They're essentially saying "we don't permit our subscribers to subscribe to mailing lists unless the mailing list is deliberately broken".
-Martin _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog
Have they switched on the DMARC policy=reject heresy? They did this for vanilla yahoo.com addresses quite recently, which breaks most users who are subscribed to sane lists. Big big controversy about this in certain quarters. Yahoo party line at: http://yahoomail.tumblr.com/post/82426900353/yahoo-dmarc-policy-change-what-... Yes, if it's this, your fixes are: 1. Rewrite the From header of such users as a simple mylist(a)mydomain.nz, or 2. Tell such users they will be kicked off the list but are welcome to rejoin with an email address from a domain that doesn't use the policy=reject heresy Regards Brian Carpenter On 29/07/2014 14:14, Martin Kealey wrote:
Last week it was Xtra blocking outbound mail at reception.
This week any message having a Xtra or Yahoo address in the From header is being rejected upon receipt from our listserver, despite the listserver using its own address in the envelope & in the Sender header.
When I follow the URL in the quoted SMTP responses, it turns out that Yahoo think I should change my listserver so that the senders address does not appear in the From header. Which sucks, because we already put the listserver's own address in the Sender header (which most mail clients will then render as "From knitting circle on behalf of Jane Smith"), and as far as I know, we're following the RFCs to the letter.
So have I missed something in the RFCs that permits Yahoo to do this? They're essentially saying "we don't permit our subscribers to subscribe to mailing lists unless the mailing list is deliberately broken".
-Martin _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog .
They probably implemented the DMARC change that Yahoo US made in April ie: "The change in this policy implemented by Yahoo means that any email message that uses a from address in the message headers of @yahoo.com must originate from Yahoo’s own mail servers." from http://www.socketlabs.com/blog/yahoo-com-changes-dmarc-policy/ The is a large thread about it in the mailop mailing list http://chilli.nosignal.org/mailman/listinfo/mailop Subject: anybody else getting nailed by DMARC rejections from Yahoo? Date: 08/04/14 Let's just say the general response was not positive, to put it mildly. On Tue, 29 Jul 2014 14:14:38 Martin Kealey wrote:
Last week it was Xtra blocking outbound mail at reception.
This week any message having a Xtra or Yahoo address in the From header is being rejected upon receipt from our listserver, despite the listserver using its own address in the envelope & in the Sender header.
When I follow the URL in the quoted SMTP responses, it turns out that Yahoo think I should change my listserver so that the senders address does not appear in the From header. Which sucks, because we already put the listserver's own address in the Sender header (which most mail clients will then render as "From knitting circle on behalf of Jane Smith"), and as far as I know, we're following the RFCs to the letter.
So have I missed something in the RFCs that permits Yahoo to do this? They're essentially saying "we don't permit our subscribers to subscribe to mailing lists unless the mailing list is deliberately broken".
-Martin _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog
-- Jean-Francois Pirus | Technical Manager francois(a)clearfield.com | Mob +64 21 640 779 | DDI +64 9 282 3401 Clearfield Software Ltd | Ph +64 9 358 2081 | www.clearfield.com
participants (4)
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Brian E Carpenter -
Jean-Francois Pirus -
Martin Kealey -
Scott Howard