The problem with Unified SPF2004-06-30 14:19:35And to followup: 1a. Even if using the same record for HELO as for other identities provides an acceptable level of assurance (which will only ever be the case when the record ends -all) sharing a complex SPF record will probably result in far more DNS queries to reject a forged HELO than would be necessary if a separate record (of whatever syntax) were used for this purpose. -roy
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