| mx1.umd.iphmx.com | 3600 | 68.232.131.46Cisco Systems Ironport Division |
| mx1.umd.iphmx.com | 3600 | 68.232.137.73Cisco Systems Ironport Division |
| mx1.umd.iphmx.com | 3600 | 68.232.142.226Cisco Systems Ironport Division |
| mx1.umd.iphmx.com | 3600 | 68.232.143.84Cisco Systems Ironport Division |
| mx1.umd.iphmx.com | 3600 | 216.71.140.161Cisco Systems Ironport Division |
| mx1.umd.iphmx.com | 3600 | 216.71.140.163Cisco Systems Ironport Division |
| mx1.umd.iphmx.com | 3600 | 216.71.149.111Cisco Systems Ironport Division |
| mx1.umd.iphmx.com | 3600 | 216.71.149.190Cisco Systems Ironport Division |