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