header __HELO_HIGHPROFILE X-Spam-Relays-External =~ /^[^\]]+ helo=\S*(?:hotmail|gmail|google|yahoo|msn|microsoft|outlook|paypal|xxx)\.[\w]+\b/i meta PDS_HELO_SPF_FAIL SPF_HELO_FAIL && __HELO_HIGHPROFILE describe PDS_HELO_SPF_FAIL High profile HELO that fails SPF score PDS_HELO_SPF_FAIL 2.0 tflags PDS_HELO_SPF_FAIL net meta PDS_HP_HELO_NORDNS RDNS_NONE && __HELO_HIGHPROFILE describe PDS_HP_HELO_NORDNS High profile HELO with no sender rDNS score PDS_HP_HELO_NORDNS 1.0