The RFC does state that. Note the use of 'future' and 'corrected'. Understand context. The perm I state, is referencing that SMTP session, yet at the end of

The RFC does state that. Note the use of 'future' and 'corrected'. Understand context. The perm I state, is referencing that SMTP session, yet at the end of the session, your job is to bounce back to end user. Else, how can the human fix things "after the spelling has been changed"? How can the human get involved without the bounce?