Update mosaab.json

sorryyyy for these many edits ):

domains/mosaab.json

@@ -13,9 +13,9 @@
             "185.199.111.153"
         ],
         "MX": [
-            "mx1.forwardemail.net",
-            "mx2.forwardemail.net"
+            "mx1.improvmx.com",
+            "mx2.improvmx.com"
         ],
-        "TXT": "forward-email=mosaabgka@gmail.com"
+        "TXT": "v=spf1 include:spf.improvmx.com ~all"
     }
 }