I send a test message to [email protected] which we know is forwarded to [email protected] which causes a 517 fail on zzzzz.com for anyonesending to this user from a domain with an SPF record.What can I advise the zzzzz.com folks on how to to alter their forwarding system so it doesn't trip this SPF filter at xxxx.com.au?
Forwarding breaks SPF, film at 11. The only thing they can do is set the envelope sender on forwarded mail to point to their own domain, with its own SPF record.
opt BOFHSPFHELO=pass,none,neutral,softfail,unknown,error opt BOFHSPFMAILFROM=pass,none,neutral,softfail,unknown,error opt BOFHSPFFROM=pass,none,neutral,softfail,unknown,error,mailfromok opt BOFHSPFTRUSTME=1
The forwarder's SPF settings have absolutely nothing to do with anything. The forwarded destination's SPF settings are the ones that determine whether or not the destination rejects the mail.
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