On Wed, Feb 15, 2017 at 2:07 AM, Gregory Casamento <[email protected] > wrote:
> Jamie, > >> Also, did u piss someone off at Google, Ricardo? Cause no matter what >> I do ur mail always end up in the spam folder! :-/ > > > If you add him as a contact that won't happen. > I have a filter that says 'if from Ricardo, never send to spam'. But I am told adding to contacts is supposed to help too (which I just did). > Libero.it has a bad certificate. > Actually, no :) It has nothing to do with libero.it's certs. But, it has everything to do with libero.it's DMARC/SPF records. These records declare which senders are valid, and also what should be done if the sender is invalid or the message bears an invalid DKIM signature. A message can have a valid DKIM signature only if it goes through libero.it's servers. A message that goes through gnu.org's mailman is modified, and thus cannot bear a valid DKIM signature. gnu.org does happen to be perceived as a valid origin for libero.it email (I believe this is because no IPv6 permitted senders are declared, and gnu.org has delivered the message to Google over IPv6). libero.it specifically declares that emails failing the checks should be quarantined. Thus, based on libero.it's setup, emails originating from libero.it and going through mailman-based mailing lists are incompatible with systems that care about DMARC, SPF and DKIM. Gmail simply obeys libero.it's requests to declare tampered emails as quarantined (in Gmail's case, quarantine -- I presume -- means "put message into spam"). To check what I'm saying, and which checks are failing, click on the down arrow next to "Reply to all" button on the right side of an individual message. Then choose "Show original" from the popup. To check the DMARC and SPF records, a useful parser is dmarcian.com.
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