string strTemp = ""; if(pEmailHeaders.ContainsKey("DKIM-Signature")){ pEmailHeaders.Remove("DKIM-Signature"); } if(pEmailHeaders.ContainsKey("dkim-signature")){ pEmailHeaders.Remove("dkim-signature"); } if(pEmailHeaders.ContainsKey("ARC-Authentication-Results")){ pEmailHeaders.Remove("ARC-Authentication-Results"); } if(pEmailHeaders.ContainsKey("ARC-Message-Signature")){ pEmailHeaders.Remove("ARC-Message-Signature"); } if(pEmailHeaders.ContainsKey("ARC-Seal")){ pEmailHeaders.Remove("ARC-Seal"); } if(pEmailHeaders.ContainsKey("arc-message-signature")){ pEmailHeaders.Remove("arc-message-signature"); } if(pEmailHeaders.ContainsKey("arc-seal")){ pEmailHeaders.Remove("arc-seal"); } if(pEmailHeaders.ContainsKey("Authentication-Results")){ pEmailHeaders.Remove("Authentication-Results"); } if(pEmailHeaders.ContainsKey("authentication-results")){ pEmailHeaders.Remove("authentication-results"); } if(pEmailHeaders.ContainsKey("X-MS-Exchange-SenderADCheck")){ pEmailHeaders.Remove("X-MS-Exchange-SenderADCheck"); } if(pEmailHeaders.ContainsKey("X-MS-Exchange-Authentication-Results")){ pEmailHeaders.Remove("X-MS-Exchange-Authentication-Results"); } return strTemp;