diff --git a/bulkvalidate/bulkvalidate.go b/bulkvalidate/bulkvalidate.go
index 10e3b09..7a05136 100644
--- a/bulkvalidate/bulkvalidate.go
+++ b/bulkvalidate/bulkvalidate.go
@@ -129,7 +129,7 @@ func writeResultsFile(results []run.VerifyEmailResponse, filePath string, append
 			resp.Email, resp.Syntax.User, resp.Syntax.Domain,
 			strconv.FormatBool(resp.Syntax.IsValid),
 			resp.IsDeliverable,
-			resp.Provider, resp.Firewall,
+			resp.Provider, resp.SecureGatewayProvider,
 			strconv.FormatBool(resp.IsRisky),
 			strconv.FormatBool(resp.Risk.IsFirewalled),
 			strconv.FormatBool(resp.Risk.IsFreeAccount),
diff --git a/internal/run/run.go b/internal/run/run.go
index 655e380..fa44b6a 100644
--- a/internal/run/run.go
+++ b/internal/run/run.go
@@ -9,18 +9,18 @@ import (
 )
 
 type VerifyEmailResponse struct {
-	Email            string
-	IsDeliverable    string
-	IsValidSyntax    bool
-	IsCatchAll       bool
-	Provider         string
-	Firewall         string
-	IsRisky          bool
-	Risk             VerifyEmailRisk
-	Syntax           mailvalidate.SyntaxValidation
-	RetryValidation  bool
-	Smtp             mailvalidate.SmtpResponse
-	MailServerHealth mailvalidate.MailServerHealth
+	Email                 string
+	IsDeliverable         string
+	IsValidSyntax         bool
+	IsCatchAll            bool
+	Provider              string
+	SecureGatewayProvider string
+	IsRisky               bool
+	Risk                  VerifyEmailRisk
+	Syntax                mailvalidate.SyntaxValidation
+	RetryValidation       bool
+	Smtp                  mailvalidate.SmtpResponse
+	MailServerHealth      mailvalidate.MailServerHealth
 }
 
 type VerifyEmailRisk struct {
@@ -81,18 +81,18 @@ func BuildResponse(
 	}
 
 	response := VerifyEmailResponse{
-		Email:            cleanEmail,
-		IsDeliverable:    email.IsDeliverable,
-		IsValidSyntax:    syntax.IsValid,
-		IsCatchAll:       domain.IsCatchAll,
-		Provider:         domain.Provider,
-		Firewall:         domain.Firewall,
-		IsRisky:          isRisky,
-		Risk:             risk,
-		RetryValidation:  email.RetryValidation,
-		Syntax:           syntax,
-		Smtp:             email.SmtpResponse,
-		MailServerHealth: email.MailServerHealth,
+		Email:                 cleanEmail,
+		IsDeliverable:         email.IsDeliverable,
+		IsValidSyntax:         syntax.IsValid,
+		IsCatchAll:            domain.IsCatchAll,
+		Provider:              domain.Provider,
+		SecureGatewayProvider: domain.SecureGatewayProvider,
+		IsRisky:               isRisky,
+		Risk:                  risk,
+		RetryValidation:       email.RetryValidation,
+		Syntax:                syntax,
+		Smtp:                  email.SmtpResponse,
+		MailServerHealth:      email.MailServerHealth,
 	}
 
 	return response
diff --git a/mailvalidate/validation.go b/mailvalidate/validation.go
index 4159e93..ff02149 100644
--- a/mailvalidate/validation.go
+++ b/mailvalidate/validation.go
@@ -30,16 +30,16 @@ type SyntaxValidation struct {
 }
 
 type DomainValidation struct {
-	Provider          string
-	Firewall          string
-	AuthorizedSenders dns.AuthorizedSenders
-	IsFirewalled      bool
-	IsCatchAll        bool
-	HasMXRecord       bool
-	HasSPFRecord      bool
-	SmtpResponse      SmtpResponse
-	MailServerHealth  MailServerHealth
-	Error             string
+	Provider              string
+	SecureGatewayProvider string
+	AuthorizedSenders     dns.AuthorizedSenders
+	IsFirewalled          bool
+	IsCatchAll            bool
+	HasMXRecord           bool
+	HasSPFRecord          bool
+	SmtpResponse          SmtpResponse
+	MailServerHealth      MailServerHealth
+	Error                 string
 }
 
 type EmailValidation struct {
@@ -196,7 +196,7 @@ func evaluateDnsRecords(validationRequest *EmailValidationRequest, knownProvider
 		provider, firewall := dns.GetEmailProviderFromMx(*validationRequest.Dns, *knownProviders)
 		results.Provider = provider
 		if firewall != "" {
-			results.Firewall = firewall
+			results.SecureGatewayProvider = firewall
 			results.IsFirewalled = true
 		}
 	}
@@ -219,7 +219,7 @@ func evaluateDnsRecords(validationRequest *EmailValidationRequest, knownProvider
 
 	if !results.IsFirewalled && len(results.AuthorizedSenders.Security) > 0 {
 		results.IsFirewalled = true
-		results.Firewall = results.AuthorizedSenders.Security[0]
+		results.SecureGatewayProvider = results.AuthorizedSenders.Security[0]
 	}
 }