I just logged into my yahoo account and used the dkimvalidator. It passes SPF and DKIM perfectly. I really doubted the claim that they don't pass DMARC since they helped set the standard. As an aside, Google is happy with either passing SPF or DKIM. From a spam viewpoint, if you pass SPF then you are authorized to send email from that server. There is a slight chance that the domain got spoofed, and that would make it trivial to spoof the SPF. DKIM is another story. It involves public and private keys. For postfix to sign the message with DKIM, you need the private key on the server. The public key is in the DNS so that links it to the domain. So if you own the domain and the private key, you must be legit. Mind you I have simplified DKIM slightly since it isn't worth me spewing a half dozen more paragraphs. Try your account with the dkimvalidator: https://dkimvalidator.com/ The website creates an email address. You send a message to that email address. Don't leave the subject line or message block blank if you want a valid spam assassination score. Wait a minute or two, then click on the check results box. The output is a bit wordly, but you will see verification for spf and dkim. This is the website I use when setting up email servers. Technically I have only proved SPF and DKIM work. That should be all that a mailing list requires. DMARC is a bit more complicated to explain, but it isn't worth talking about unless you fail SPF or DKIM. The email system administrator in theory processes reports from other email servers in order to see if any accounts on their server have been spoofed. I say in theory because there is no way to tell if the administrator reads the DMARC reports. On the bright side, I have had no ALSA problems in my latest opensuse upgrade! Original Message From: phil@xxxxxxxxxxxxx Sent: August 3, 2020 10:52 PM To: alsa-user@xxxxxxxxxxxxxxxxxxxxx; users@xxxxxxxxxxxxxxxxxxx Reply-to: phil@xxxxxxxxxxxxx Subject: This appears to be the problem I am getting with this list - and now other lists - DMARC / DKIM / SPF People, FYI, this seems to explain (most of) my hassles mailing to this list: Yahoo breaks every mailing list in the world including the IETF's https://mailarchive.ietf.org/arch/msg/ietf/J-IsfA0Lb-6T_NeMD1ENKZyb9tA/ Phil. -- Philip Rhoades PO Box 896 Cowra NSW 2794 Australia E-mail: phil@xxxxxxxxxxxxx _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
