spf check online

  1. send an email message to:

    spf@tester.realsender.com
    
  2. check online the SPF validation results:
    (it will take a minute to appear)

    https://tester.realsender.com/spf
    


RealSender SPF check online will add a subject prefix, if the message has not been authenticated correctly:

!! spf-none !!       if the sender domain contains no information to authenticate the email  
!! spf-softfail !!   if the smtp server is not listed among the authorized ones but this case should be treated as a "softfail"  
!! spf-fail !!       if the smtp server is not listed among the authorized ones and the email should be rejected or discarded

Sometimes the information recorded at domain level is not correct/understandable.

!! spf-permerror !!  if a permanent error has occured (eg. badly formatted SPF record)

SPF check online is made against the “envelope sender” email address. In this case the recipient may see another “from” address.

!! spf-diff !!       if the "envelope sender" and the "from" addresses are different


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