So, what sounds better from this point of view? Tens of thousands of legitimate messages blocked or filtered according to your DMARC enthusiasts blindly saying they all need a denial of service policy, or incorrect application of the underlying authentication standards of the SPF and DKIM. If denial of DMARC is detrimental to service capacity, why would an organization like the WHO want to have a denial of service policy on DMARC? As an organization that sends highly relevant electronic messages to highly engaged audiences, it must be sensitive to its ability to provide services. With what we know about DMARC, it seems an obvious argument for a strict DMARC policy, doesn’t it? That is precisely why the DMARC protocol was set up; to prevent bad guys from abusing their domain. Something like this was said: “The publication of a policy to reject the DMARC could be considered negligent because it would lead to the rejection of certain accusations”. “Suffice it to say that this is not a marginal opinion.” Those who think that the DMARC can block genuine mail are technically correct, at least on the essential point that the DMARC’s rejection policy would lead to the blocking or filtering of certain mail. At the time of writing, the WHO’s current DMARC policy is p=nona, which only requires the communication of e-mails using its domains. The decision on the desirability of a DMARC email denial policy must be made on a case-by-case basis and with expert input. It is to the credit of opponents of a strict WHO policy that a DMARC rejection policy is not a good idea for all senders. It shouldn’t surprise anyone that bad cops are exploiting the biggest global crisis of generations for personal gain, but even as an experienced veteran in the world of email and email abuse, I was truly surprised at the scale of malware, phishing and other abuses specifically targeted at the crisis. This is the usual starting point for the implementation of DMARC, but at this stage there may be some things that can help reduce identity theft or additional phishing in the subdomains. If your domain unexpectedly starts to generate higher rates for complaints and bounce and phishing reports, you can easily destroy your domain’s reputation overnight. Surprisingly, there is no other reason why email is blocked or filtered: the poor reputation of the domain.
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