diff --git a/DNSHealth/MailProviders/Mimecast.json b/DNSHealth/MailProviders/Mimecast.json
index 1ab6820..7955338 100644
--- a/DNSHealth/MailProviders/Mimecast.json
+++ b/DNSHealth/MailProviders/Mimecast.json
@@ -1,6 +1,6 @@
 {
     "Name": "Mimecast",
-    "MxMatch": "(?<Prefix>[a-z]{2})-smtp-inbound-[0-9].mimecast.com",
+    "MxMatch": "^(?<Prefix>[a-z]{2,3})-smtp-inbound-[0-9]\\.mimecast\\.(?:com|co\\.za)",
     "SpfInclude": "{0}._netblocks.mimecast.com",
     "SpfReplace": [ "Prefix" ],
     "Selectors": [],
diff --git a/DNSHealth/MailProviders/MimecastOffshore.json b/DNSHealth/MailProviders/MimecastOffshore.json
new file mode 100644
index 0000000..371d416
--- /dev/null
+++ b/DNSHealth/MailProviders/MimecastOffshore.json
@@ -0,0 +1,10 @@
+{
+    "Name": "Mimecast Offshore",
+    "MxMatch": "^(?<Prefix>[a-z]{2,3})-smtp-inbound-[0-9]\\.mimecast-offshore\\.com",
+    "SpfInclude": "",
+    "SpfReplace": [],
+    "Selectors": [],
+    "_MxComment": "https://community.mimecast.com/s/article/Connect-Application-Modifying-Your-MX-Records-673313100",
+    "_SpfComment": "Offshore (Jersey) region netblock include is not publicly documented; leave empty so no incorrect SPF include is asserted.",
+    "_DkimComment": "https://community.mimecast.com/s/article/DNS-Authentication-Configuration-Guide-345109074"
+}