diff --git a/core/tx_pool.go b/core/tx_pool.go
index e98fd2e0ae..28a2c5bfb2 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -174,7 +174,8 @@ type TxPoolConfig struct {
 	AccountQueue uint64 // Maximum number of non-executable transaction slots permitted per account
 	GlobalQueue  uint64 // Maximum number of non-executable transaction slots for all accounts
 
-	Lifetime time.Duration // Maximum amount of time non-executable transaction are queued
+	Lifetime            time.Duration // Maximum amount of time non-executable transaction are queued
+	AllowUnprotectedTxs bool          // Allow non-EIP-155 transactions
 }
 
 // DefaultTxPoolConfig contains the default configurations for the transaction
@@ -191,7 +192,8 @@ var DefaultTxPoolConfig = TxPoolConfig{
 	AccountQueue: 64,
 	GlobalQueue:  1024,
 
-	Lifetime: 3 * time.Hour,
+	Lifetime:            3 * time.Hour,
+	AllowUnprotectedTxs: false,
 }
 
 // sanitize checks the provided user configurations and changes anything that's
@@ -759,7 +761,7 @@ func (pool *TxPool) validateTx(tx *types.Transaction, local bool) error {
 
 	// Make sure the transaction is signed properly.
 	from, err := types.Sender(pool.signer, tx)
-	if err != nil {
+	if err != nil && !pool.config.AllowUnprotectedTxs {
 		return ErrInvalidSender
 	}
 
@@ -1096,6 +1098,11 @@ func (pool *TxPool) addTxs(txs []*types.Transaction, local, sync bool) []error {
 		// Exclude transactions with invalid signatures as soon as
 		// possible and cache senders in transactions before
 		// obtaining lock
+
+		if pool.config.AllowUnprotectedTxs {
+			pool.signer = types.NewFakeSigner(tx.ChainId())
+		}
+
 		_, err = types.Sender(pool.signer, tx)
 		if err != nil {
 			errs = append(errs, ErrInvalidSender)
@@ -1149,11 +1156,16 @@ func (pool *TxPool) addTx(tx *types.Transaction, local, sync bool) error {
 		// Exclude transactions with invalid signatures as soon as
 		// possible and cache senders in transactions before
 		// obtaining lock
+		if pool.config.AllowUnprotectedTxs {
+			pool.signer = types.NewFakeSigner(tx.ChainId())
+		}
+
 		_, err = types.Sender(pool.signer, tx)
 		if err != nil {
 			invalidTxMeter.Mark(1)
-
 			return
+		} else {
+			err = nil
 		}
 	}()
 
diff --git a/core/types/transaction_signing.go b/core/types/transaction_signing.go
index 959aba637a..8f3fd7a4c7 100644
--- a/core/types/transaction_signing.go
+++ b/core/types/transaction_signing.go
@@ -470,6 +470,42 @@ func (fs FrontierSigner) Hash(tx *Transaction) common.Hash {
 	})
 }
 
+// FakeSigner implements the Signer interface and accepts unprotected transactions
+type FakeSigner struct{ londonSigner }
+
+var _ Signer = FakeSigner{}
+
+func NewFakeSigner(chainId *big.Int) Signer {
+	signer := NewLondonSigner(chainId)
+	ls, _ := signer.(londonSigner)
+
+	return FakeSigner{londonSigner: ls}
+}
+
+func (f FakeSigner) Sender(tx *Transaction) (common.Address, error) {
+	return f.londonSigner.Sender(tx)
+}
+
+func (f FakeSigner) SignatureValues(tx *Transaction, sig []byte) (r, s, v *big.Int, err error) {
+	return f.londonSigner.SignatureValues(tx, sig)
+}
+
+func (f FakeSigner) ChainID() *big.Int {
+	return f.londonSigner.ChainID()
+}
+
+// Hash returns 'signature hash', i.e. the transaction hash that is signed by the
+// private key. This hash does not uniquely identify the transaction.
+func (f FakeSigner) Hash(tx *Transaction) common.Hash {
+	return f.londonSigner.Hash(tx)
+}
+
+// Equal returns true if the given signer is the same as the receiver.
+func (f FakeSigner) Equal(Signer) bool {
+	// Always return true
+	return true
+}
+
 func decodeSignature(sig []byte) (r, s, v *big.Int) {
 	if len(sig) != crypto.SignatureLength {
 		panic(fmt.Sprintf("wrong size for signature: got %d, want %d", len(sig), crypto.SignatureLength))
diff --git a/eth/backend.go b/eth/backend.go
index 824fec8914..869566a7ac 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -174,7 +174,9 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
 	// START: Bor changes
 	eth.APIBackend = &EthAPIBackend{stack.Config().ExtRPCEnabled(), stack.Config().AllowUnprotectedTxs, eth, nil}
 	if eth.APIBackend.allowUnprotectedTxs {
-		log.Info("Unprotected transactions allowed")
+		log.Debug(" ###########", "Unprotected transactions allowed")
+
+		config.TxPool.AllowUnprotectedTxs = true
 	}
 	gpoParams := config.GPO
 	if gpoParams.Default == nil {
diff --git a/internal/cli/server/config.go b/internal/cli/server/config.go
index ce56107778..67780c9423 100644
--- a/internal/cli/server/config.go
+++ b/internal/cli/server/config.go
@@ -254,6 +254,8 @@ type JsonRPCConfig struct {
 	Graphql *APIConfig `hcl:"graphql,block" toml:"graphql,block"`
 
 	HttpTimeout *HttpTimeouts `hcl:"timeouts,block" toml:"timeouts,block"`
+
+	AllowUnprotectedTxs bool `hcl:"unprotectedtxs,optional" toml:"unprotectedtxs,optional"`
 }
 
 type GRPCConfig struct {
@@ -504,10 +506,11 @@ func DefaultConfig() *Config {
 			IgnorePrice: gasprice.DefaultIgnorePrice,
 		},
 		JsonRPC: &JsonRPCConfig{
-			IPCDisable: false,
-			IPCPath:    "",
-			GasCap:     ethconfig.Defaults.RPCGasCap,
-			TxFeeCap:   ethconfig.Defaults.RPCTxFeeCap,
+			IPCDisable:          false,
+			IPCPath:             "",
+			GasCap:              ethconfig.Defaults.RPCGasCap,
+			TxFeeCap:            ethconfig.Defaults.RPCTxFeeCap,
+			AllowUnprotectedTxs: false,
 			Http: &APIConfig{
 				Enabled: false,
 				Port:    8545,
@@ -1049,6 +1052,7 @@ func (c *Config) buildNode() (*node.Config, error) {
 		InsecureUnlockAllowed: c.Accounts.AllowInsecureUnlock,
 		Version:               params.VersionWithCommit(gitCommit, gitDate),
 		IPCPath:               ipcPath,
+		AllowUnprotectedTxs:   c.JsonRPC.AllowUnprotectedTxs,
 		P2P: p2p.Config{
 			MaxPeers:        int(c.P2P.MaxPeers),
 			MaxPendingPeers: int(c.P2P.MaxPendPeers),
diff --git a/internal/cli/server/flags.go b/internal/cli/server/flags.go
index 19792a7bb1..a0fad2465d 100644
--- a/internal/cli/server/flags.go
+++ b/internal/cli/server/flags.go
@@ -364,6 +364,13 @@ func (c *Command) Flags() *flagset.Flagset {
 		Default: c.cliConfig.JsonRPC.TxFeeCap,
 		Group:   "JsonRPC",
 	})
+	f.BoolFlag(&flagset.BoolFlag{
+		Name:    "rpc.allow-unprotected-txs",
+		Usage:   "Allow for unprotected (non EIP155 signed) transactions to be submitted via RPC",
+		Value:   &c.cliConfig.JsonRPC.AllowUnprotectedTxs,
+		Default: c.cliConfig.JsonRPC.AllowUnprotectedTxs,
+		Group:   "JsonRPC",
+	})
 	f.BoolFlag(&flagset.BoolFlag{
 		Name:    "ipcdisable",
 		Usage:   "Disable the IPC-RPC server",
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 7df46b1f33..0f8494674f 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1856,7 +1856,8 @@ func SubmitTransaction(ctx context.Context, b Backend, tx *types.Transaction) (c
 	// Print a log with full tx details for manual investigations and interventions
 	signer := types.MakeSigner(b.ChainConfig(), b.CurrentBlock().Number())
 	from, err := types.Sender(signer, tx)
-	if err != nil {
+
+	if err != nil && (!b.UnprotectedAllowed() || (b.UnprotectedAllowed() && err != types.ErrInvalidChainId)) {
 		return common.Hash{}, err
 	}
 
@@ -2046,6 +2047,10 @@ func (s *PublicTransactionPoolAPI) Resend(ctx context.Context, sendArgs Transact
 	for _, p := range pending {
 		wantSigHash := s.signer.Hash(matchTx)
 		pFrom, err := types.Sender(s.signer, p)
+
+		if err != nil && (s.b.UnprotectedAllowed() && err == types.ErrInvalidChainId) {
+			err = nil
+		}
 		if err == nil && pFrom == sendArgs.from() && s.signer.Hash(p) == wantSigHash {
 			// Match. Re-sign and send the transaction.
 			if gasPrice != nil && (*big.Int)(gasPrice).Sign() != 0 {