On 20/11/2019 13:17, Jon Burke via mailop wrote:
I know ISPs can enforce a stricter policy (e.g. reject although policy is p=quarantine) but I don’t often see ISPs applying a more lenient response than stated in the DMARC policy. I can think of one reason for doing so (user added the sender to his / her safe-sender list) and wanted to ask if you know of some other reasons?Forwarded messages will fail SPF checks, so mail servers may decide to accept messages that have failed SPF checks in case they've been forwarded.
Users still use MTA-level forwarding now, especially to free email addresses like Hotmail & Gmail, so I guess those providers are stuck between a rock and a hard place - either reject spoofed and forwarded mail and upset users, or accept it and upset users.
-- Paul Smith Computer Services Tel: 01484 855800 Vat No: GB 685 6987 53 Sign up for news & updates at http://www.pscs.co.uk/go/subscribe
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