Re:My account is sending spam emails
by bertjk on Sunday April 22, 2018 @02:19AM
(#16894952)
This part is interesting:
I had thought that as of early 2017 that had changed the DMARC policy to p=REJECT which would basically reject any attempts at spoofing gmail.com in the From: field. It seems as if someone suddenly (maybe accidentally) reverted that change?
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It appears to be validating the envelope sender ([email protected]) rather than the from address, per the spec.
The thing is, telus.com doesn't have a DMARC record, and thier SPF record doesn't include 69.64.35.11. This header might be fake. Gmail does currently have a DMARC record that says p=none sp=quarantine. The 'sp' value only applies to subdomains, so the "none" (no action) policy should be used.
Edit: I just verified that gmail's dmarc has had p=none for a long time.