MMS: send images as MMS, send other types as link

main.js

@@ -353,11 +353,29 @@ function sendMMS(number, from, mediauri, mimetype, callback) {
 
     httpmediaurl = httpmediaurl.replace("{{server-name}}", urichunks[2]);
     httpmediaurl = httpmediaurl.replace("{{media-id}}", urichunks[3]);
+
+    var body = "";
+    var media = [httpmediaurl];
+
+    switch (mimetype) {
+        case "image/jpeg":
+        case "image/png":
+        case "image/gif":
+        case "image/bmp":
+            // These are likely to work, so don't include the URL
+            body = "";
+            break;
+        default:
+            // Send link to content as SMS, don't send actual content
+            body = httpmediaurl;
+            media = [];
+    }
+
     var data = {
         to: [number],
         from: from,
-        body: httpmediaurl,
+        body: body,
-        media: [httpmediaurl]
+        media: media
     };
     const jsondata = JSON.stringify(data);
     const options = {