diff --git a/typescript/infra/config/environments/mainnet3/agent.ts b/typescript/infra/config/environments/mainnet3/agent.ts
index 7820908d81..3756344809 100644
--- a/typescript/infra/config/environments/mainnet3/agent.ts
+++ b/typescript/infra/config/environments/mainnet3/agent.ts
@@ -537,6 +537,10 @@ const blacklistedMessageIds = [
   // ETH/arbitrum-base-blast-bsc-ethereum-gnosis-lisk-mantle-mode-optimism-polygon-scroll-zeronetwork-zoramainnet
   '0x229a832dfdfa23dfc27eb773e6b34e87f329067393f4f7b616251b3d7d52d294',
   '0xcdfd5294e8b1253263908e1919d27675f80a2e9a3bb339b759810efdbb81faa5',
+
+  // txs between unenrolled routers of
+  // USDT/arbitrum-ethereum-mantle-mode-polygon-scroll-zeronetwork
+  '0x10159bf1b5b2142b882cb060d1da9f9123d82974ca265ba432138221e52c2a27',
 ];
 
 // Blacklist matching list intended to be used by all contexts.