diff --git a/lib/transport.js b/lib/transport.js
index 2f49eb2..2e6ef83 100644
--- a/lib/transport.js
+++ b/lib/transport.js
@@ -13,6 +13,8 @@ async function send(partner, msg) {
 
     if (!destination || !Number(destination) || destination.length < 8) return;
 
+    if (msg.trim().search(/sdg DIPROSES$/) >= 0) return;
+
     const msgFileContent = `
 To: ${destination}