Hello. You would need to provide the full headers of the email, since DMARC is a multistep process, including SPF validation.
DMARC also will fail if the mail is forwarded. Suggestion: Post your headers into a ChatGPT session, ask it for assistance :) Matthew On 2/15/2026 10:24 AM, lejeczek via Postfix-users wrote: > Hi guys. > > I won't ask is that possible - though certainly it made me frown - > because > it's happening. > Everywhere - so far - I emailed, including usual suspects, eg.: gmail, > > yahoo, etc. I got _pass_ > Now I get bounces - only from this one place/destination - saying: >
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