Rejective

DMARC p=reject

• steve
• Technical

Mail.ru is switching to p=reject.
This means that you should special-case mail.ru wherever …
Actually, no. Time to change that script.
If you operate an ESP or develop mailing list software you should be checking whether the email address that is being used in the From: address of email you’re sending is in a domain that’s publishing p=reject (is a “rejective” email address) automatically. And you should probably do that in real time, whenever you need that piece of information, relying on DNS caching to reduce the network latency.
If you find you’re about to send an email From a rejective email address, you probably shouldn’t send it. Depending on how the recipients’ ISPs handle it, it might be discarded put in the bulk folder or rejected – potentially leading to recipients being unsubscribed.
If you’re writing mailing list software, ideally you should provide your users with several options for handling submissions from rejective email addresses, perhaps some from this list: