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Just wondering, is anyone using DMARC or SFP settings on the Nameservers to protect against spoofing. Never noticed it before but on gmail they seem to check against sfp settings. Before: Received-SPF: none (google.com: info@xxxxxxxxxxxxx.ie does not designate permitted sender hosts) client-ip=xx.xxx.xxx.xxx; Authentication-Results: mx.google.com; spf=neutral (google.com: info@xxxxxxxxxxxxx.ie does not designate permitted sender hosts) smtp.mail=info@xxxxxxxxxxxx.ie Received: from www.xxxxxxxxxxxx.ie (xxxxxxx.xxxxxxserver.net [xx.xxx.xxx.xxx]) After adding a TXT record to the Nameserver: TXT "v=spf1 mx -all" Authentication-Results: mx.google.com; spf=pass (google.com: domain of info@xxxxxxxxxxxxx.ie designates xx.xxx.xxx.xxx as permitted sender) smtp.mail=info@xxxxxxxxxxxx.ieReceived: from www.xxxxxxxxxxxx.ie (xxxxxxxxxx.xxxxxxxxserver.net [xx.xxx.xxx.xxx]) by xxxxxxxxxx.xxxxxxxxserver.net (Postfix) with ESMTPA id fsdasdsdafsfdxxsdfadsf My Questions: 1. Did anyone implement this on all the domains running on a froxlor server? 2. If Yes, what record did they use? 3. Is there anything to watch out for? IE. The sender domain is not the one specified in the Postfix-Configuration. Does this cause problems? Thank you for any feedback. Regards, rolo2912