DNS:mail558.messagelabs.com, DNS:cluster2a.eu.messagelabs.com, DNS:cluster2a.us.messagelabs.com, DNS:cluster4a.us.messagelabs.com, DNS:cluster9bnya.us.messagelabs.com, DNS:cluster1a.eu.messagelabs.com, DNS:cluster1a.uk.messagelabs.com, DNS:cluster4a.eu.messagelabs.com, DNS:cluster5a.us.messagelabs.com, DNS:cluster9a.us.messagelabs.com, DNS:cluster10a.us.messagelabs.com, DNS:cluster1a.in.messagelabs.com, DNS:cluster1a.messagelabs.com, DNS:cluster9a.eu.messagelabs.com, DNS:mail555.messagelabs.com, DNS:cluster11a.eu.messagelabs.com, DNS:cluster12a.us.messagelabs.com, DNS:cluster3a.eu.messagelabs.com, DNS:cluster5a.eu.messagelabs.com, DNS:cluster6a.us.messagelabs.com, DNS:cluster8a.eu.messagelabs.com, DNS:cluster8a.us.messagelabs.com, DNS:cluster11a.us.messagelabs.com, DNS:cluster1a.us.messagelabs.com