Hello,

I tried to send this email to my gmail address:

******************************************************
250-mx.google.com at your service, []
250-SIZE 10485760
250-8BITMIME
250-STARTTLS
250-ENHANCEDSTATUSCODES
250 SMTPUTF8
mail from: <[email protected]>
250 2.1.0 OK t92si13919150ota.85 - gsmtp
rcpt to: <[email protected]>
250 2.1.5 OK t92si13919150ota.85 - gsmtp
data
354 end data with <CR><LF>.<CR><LF>
From: [email protected]
test mail.
.
550-5.7.1 Unauthenticated email from prnk.cz is not accepted due to domain's
550-5.7.1 DMARC policy. Please contact the administrator of prnk.cz domain if
550-5.7.1 this was a legitimate mail. Please visit
550-5.7.1  https://support.google.com/mail/answer/2451690 to learn about the
550 5.7.1 DMARC initiative. t92si13919150ota.85 - gsmtp
******************************************************

Domain a.prnk.cz doesnt have DMARC record. Domain prnk.cz has a DMARC record that contains p=reject and sp=none. It looks like gmail doesn't respect subdomain policy and rejects the email even when sp=none. I am quite sure that when I tried similar email some time ago, it worked just fine. Does anyone know, did gmail change it's DMARC check or am I doing something wrong?

Best Regards
  Petr
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