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<div>Since your comeback, your messages have gone into my spam folder. The messages from Kevin and Chris I don't see at all though!</div><div><br></div><div>Toby</div><div><br></div>
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On Tuesday 23 July 2024 at 23:48:54 BST, Kristofer Munsterhjelm <km-elmet@munsterhjelm.no> wrote:
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<div><div dir="ltr">On 2024-07-23 23:06, Toby Pereira wrote:<div class="ydpdb4b1f55yqt4135092496" id="ydpdb4b1f55yqtfd13936"><br clear="none">> I don't see most messages from Chris Benham or Kevin Venzke. I think it <br clear="none">> might be something to do with us all using Yahoo, but you aren't so <br clear="none">> there might be something else going on there.</div><br clear="none"><br clear="none">I think that's due to different ISPs having different DMARC policies.<br clear="none"><br clear="none">After some web browsing, I found the following explanation:<br clear="none"><br clear="none">> There are three essential DMARC policy options: "none," "quarantine," and "reject".<br clear="none">> <br clear="none">> - The "none" policy, also known as "monitor" tells the provider to<br clear="none">> take no action.<br clear="none">> - The "quarantine" policy sends any unauthorized emails into a<br clear="none">> separate folder, similar to a spam folder.<br clear="none">> - The "reject" policy tells the provider to block any unauthorized<br clear="none">> emails so that they cannot reach recipients.<br clear="none"><br clear="none">These tell the receiving mail host what to do if the DMARC check fails. <br clear="none">They're set by DNS. For instance, for Yahoo:<br clear="none"><br clear="none">$ dig -t TXT _DMARC.yahoo.co.uk<br clear="none">(...)<br clear="none">;; ANSWER SECTION:<br clear="none">_DMARC.yahoo.co.uk. 1800 IN TXT "v=DMARC1; p=reject; pct=100; <br clear="none">rua=mailto:d@rua.agari.com; ruf=mailto:d@ruf.agari.com;"<br clear="none"><br clear="none">p=reject sets the policy for any mails claiming to be from yahoo.co.uk <br clear="none">to "reject". So the recipient should just delete them if they fail the <br clear="none">DMARC check (as far as I understand). Fortunately for me, my provider <br clear="none">just adds a penalty of 10 instead.<br clear="none"><br clear="none">My own provider sets "p=quarantine". If Yahoo follows the policies <br clear="none">literally, that should put my EM posts in your (Toby's) spam folder.<br clear="none"><br clear="none">-km<div class="ydpdb4b1f55yqt4135092496" id="ydpdb4b1f55yqtfd94598"><br clear="none"></div></div></div>
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