diff --git a/auth/email_action_links.go b/auth/email_action_links.go
index 6b649254..e62aac54 100644
--- a/auth/email_action_links.go
+++ b/auth/email_action_links.go
@@ -32,6 +32,7 @@ type ActionCodeSettings struct {
 	AndroidMinimumVersion string `json:"androidMinimumVersion,omitempty"`
 	AndroidInstallApp     bool   `json:"androidInstallApp,omitempty"`
 	DynamicLinkDomain     string `json:"dynamicLinkDomain,omitempty"`
+	SendEmailLink         bool   `json:"-"`
 }
 
 func (settings *ActionCodeSettings) toMap() (map[string]interface{}, error) {
@@ -39,8 +40,8 @@ func (settings *ActionCodeSettings) toMap() (map[string]interface{}, error) {
 		return nil, errors.New("URL must not be empty")
 	}
 
-	url, err := url.Parse(settings.URL)
-	if err != nil || url.Scheme == "" || url.Host == "" {
+	parsedURL, err := url.Parse(settings.URL)
+	if err != nil || parsedURL.Scheme == "" || parsedURL.Host == "" {
 		return nil, fmt.Errorf("malformed url string: %q", settings.URL)
 	}
 
@@ -58,6 +59,9 @@ func (settings *ActionCodeSettings) toMap() (map[string]interface{}, error) {
 	if err := json.Unmarshal(b, &result); err != nil {
 		return nil, err
 	}
+	// Since SendEmailLink defaults to false, we will always set "returnOobLink" to true by default.
+	// This means no email is sent out in the default case
+	result["returnOobLink"] = !settings.SendEmailLink
 	return result, nil
 }
 
@@ -114,9 +118,8 @@ func (c *baseClient) generateEmailActionLink(
 	}
 
 	payload := map[string]interface{}{
-		"requestType":   linkType,
-		"email":         email,
-		"returnOobLink": true,
+		"requestType": linkType,
+		"email":       email,
 	}
 	if settings != nil {
 		settingsMap, err := settings.toMap()
diff --git a/auth/email_action_links_test.go b/auth/email_action_links_test.go
index 876f3300..a71591dd 100644
--- a/auth/email_action_links_test.go
+++ b/auth/email_action_links_test.go
@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"net/http"
 	"reflect"
+	"strconv"
 	"testing"
 
 	"firebase.google.com/go/v4/errorutils"
@@ -98,9 +99,8 @@ func TestEmailVerificationLink(t *testing.T) {
 	}
 
 	want := map[string]interface{}{
-		"requestType":   "VERIFY_EMAIL",
-		"email":         testEmail,
-		"returnOobLink": true,
+		"requestType": "VERIFY_EMAIL",
+		"email":       testEmail,
 	}
 	if err := checkActionLinkRequest(want, s); err != nil {
 		t.Fatalf("EmailVerificationLink() %v", err)
@@ -111,24 +111,32 @@ func TestEmailVerificationLinkWithSettings(t *testing.T) {
 	s := echoServer(testActionLinkResponse, t)
 	defer s.Close()
 
-	link, err := s.Client.EmailVerificationLinkWithSettings(context.Background(), testEmail, testActionCodeSettings)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if link != testActionLink {
-		t.Errorf("EmailVerificationLinkWithSettings() = %q; want = %q", link, testActionLink)
-	}
+	cases := []string{"true", "false", ""}
+	testActionCodeSettingsCustom, testActionCodeSettingsMapCustom := getCopiesOfTestSettings(testActionCodeSettings,
+		testActionCodeSettingsMap)
+	for _, caseStr := range cases {
+		if returnOobLink, err := strconv.ParseBool(caseStr); err == nil {
+			testActionCodeSettingsCustom.SendEmailLink = !returnOobLink
+			testActionCodeSettingsMapCustom["returnOobLink"] = returnOobLink
+		}
+		link, err := s.Client.EmailVerificationLinkWithSettings(context.Background(), testEmail, testActionCodeSettingsCustom)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if link != testActionLink {
+			t.Errorf("EmailVerificationLinkWithSettings() = %q; want = %q", link, testActionLink)
+		}
 
-	want := map[string]interface{}{
-		"requestType":   "VERIFY_EMAIL",
-		"email":         testEmail,
-		"returnOobLink": true,
-	}
-	for k, v := range testActionCodeSettingsMap {
-		want[k] = v
-	}
-	if err := checkActionLinkRequest(want, s); err != nil {
-		t.Fatalf("EmailVerificationLinkWithSettings() %v", err)
+		want := map[string]interface{}{
+			"requestType": "VERIFY_EMAIL",
+			"email":       testEmail,
+		}
+		for k, v := range testActionCodeSettingsMapCustom {
+			want[k] = v
+		}
+		if err := checkActionLinkRequest(want, s); err != nil {
+			t.Fatalf("EmailVerificationLinkWithSettings() %v", err)
+		}
 	}
 }
 
@@ -145,9 +153,8 @@ func TestPasswordResetLink(t *testing.T) {
 	}
 
 	want := map[string]interface{}{
-		"requestType":   "PASSWORD_RESET",
-		"email":         testEmail,
-		"returnOobLink": true,
+		"requestType": "PASSWORD_RESET",
+		"email":       testEmail,
 	}
 	if err := checkActionLinkRequest(want, s); err != nil {
 		t.Fatalf("PasswordResetLink() %v", err)
@@ -158,24 +165,30 @@ func TestPasswordResetLinkWithSettings(t *testing.T) {
 	s := echoServer(testActionLinkResponse, t)
 	defer s.Close()
 
-	link, err := s.Client.PasswordResetLinkWithSettings(context.Background(), testEmail, testActionCodeSettings)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if link != testActionLink {
-		t.Errorf("PasswordResetLinkWithSettings() = %q; want = %q", link, testActionLink)
-	}
+	cases := []bool{true, false}
+	testActionCodeSettingsCustom, testActionCodeSettingsMapCustom := getCopiesOfTestSettings(testActionCodeSettings,
+		testActionCodeSettingsMap)
+	for _, returnOobLink := range cases {
+		testActionCodeSettingsCustom.SendEmailLink = !returnOobLink
+		testActionCodeSettingsMapCustom["returnOobLink"] = returnOobLink
+		link, err := s.Client.PasswordResetLinkWithSettings(context.Background(), testEmail, testActionCodeSettingsCustom)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if link != testActionLink {
+			t.Errorf("PasswordResetLinkWithSettings() = %q; want = %q", link, testActionLink)
+		}
 
-	want := map[string]interface{}{
-		"requestType":   "PASSWORD_RESET",
-		"email":         testEmail,
-		"returnOobLink": true,
-	}
-	for k, v := range testActionCodeSettingsMap {
-		want[k] = v
-	}
-	if err := checkActionLinkRequest(want, s); err != nil {
-		t.Fatalf("PasswordResetLinkWithSettings() %v", err)
+		want := map[string]interface{}{
+			"requestType": "PASSWORD_RESET",
+			"email":       testEmail,
+		}
+		for k, v := range testActionCodeSettingsMapCustom {
+			want[k] = v
+		}
+		if err := checkActionLinkRequest(want, s); err != nil {
+			t.Fatalf("PasswordResetLinkWithSettings() %v", err)
+		}
 	}
 }
 
@@ -204,24 +217,29 @@ func TestEmailSignInLink(t *testing.T) {
 	s := echoServer(testActionLinkResponse, t)
 	defer s.Close()
 
-	link, err := s.Client.EmailSignInLink(context.Background(), testEmail, testActionCodeSettings)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if link != testActionLink {
-		t.Errorf("EmailSignInLink() = %q; want = %q", link, testActionLink)
-	}
-
-	want := map[string]interface{}{
-		"requestType":   "EMAIL_SIGNIN",
-		"email":         testEmail,
-		"returnOobLink": true,
-	}
-	for k, v := range testActionCodeSettingsMap {
-		want[k] = v
-	}
-	if err := checkActionLinkRequest(want, s); err != nil {
-		t.Fatalf("EmailSignInLink() %v", err)
+	cases := []bool{true, false}
+	testActionCodeSettingsCustom, testActionCodeSettingsMapCustom := getCopiesOfTestSettings(testActionCodeSettings,
+		testActionCodeSettingsMap)
+	for _, returnOobLink := range cases {
+		testActionCodeSettingsCustom.SendEmailLink = !returnOobLink
+		testActionCodeSettingsMapCustom["returnOobLink"] = returnOobLink
+		link, err := s.Client.EmailSignInLink(context.Background(), testEmail, testActionCodeSettingsCustom)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if link != testActionLink {
+			t.Errorf("EmailSignInLink() = %q; want = %q", link, testActionLink)
+		}
+		want := map[string]interface{}{
+			"requestType": "EMAIL_SIGNIN",
+			"email":       testEmail,
+		}
+		for k, v := range testActionCodeSettingsMapCustom {
+			want[k] = v
+		}
+		if err := checkActionLinkRequest(want, s); err != nil {
+			t.Fatalf("EmailSignInLink() %v", err)
+		}
 	}
 }
 
@@ -333,3 +351,22 @@ func checkActionLinkRequestWithURL(want map[string]interface{}, wantURL string,
 	}
 	return nil
 }
+
+func getCopiesOfTestSettings(testSettings *ActionCodeSettings,
+	testSettingsMap map[string]interface{}) (*ActionCodeSettings, map[string]interface{}) {
+	testActionCodeSettingsCustom := &ActionCodeSettings{
+		URL:                   testSettings.URL,
+		HandleCodeInApp:       testSettings.HandleCodeInApp,
+		IOSBundleID:           testSettings.IOSBundleID,
+		AndroidPackageName:    testSettings.AndroidPackageName,
+		AndroidMinimumVersion: testSettings.AndroidMinimumVersion,
+		AndroidInstallApp:     testSettings.AndroidInstallApp,
+		DynamicLinkDomain:     testSettings.DynamicLinkDomain,
+		SendEmailLink:         testSettings.SendEmailLink,
+	}
+	testActionCodeSettingsMapCustom := map[string]interface{}{}
+	for k, v := range testSettingsMap {
+		testActionCodeSettingsMapCustom[k] = v
+	}
+	return testActionCodeSettingsCustom, testActionCodeSettingsMapCustom
+}
diff --git a/auth/tenant_mgt_test.go b/auth/tenant_mgt_test.go
index 77c26851..8881fce1 100644
--- a/auth/tenant_mgt_test.go
+++ b/auth/tenant_mgt_test.go
@@ -503,9 +503,8 @@ func TestTenantEmailVerificationLink(t *testing.T) {
 	}
 
 	want := map[string]interface{}{
-		"requestType":   "VERIFY_EMAIL",
-		"email":         testEmail,
-		"returnOobLink": true,
+		"requestType": "VERIFY_EMAIL",
+		"email":       testEmail,
 	}
 	if err := checkActionLinkRequestWithURL(want, wantEmailActionURL, s); err != nil {
 		t.Fatalf("EmailVerificationLink() %v", err)
@@ -530,9 +529,8 @@ func TestTenantPasswordResetLink(t *testing.T) {
 	}
 
 	want := map[string]interface{}{
-		"requestType":   "PASSWORD_RESET",
-		"email":         testEmail,
-		"returnOobLink": true,
+		"requestType": "PASSWORD_RESET",
+		"email":       testEmail,
 	}
 	if err := checkActionLinkRequestWithURL(want, wantEmailActionURL, s); err != nil {
 		t.Fatalf("PasswordResetLink() %v", err)
@@ -548,24 +546,30 @@ func TestTenantEmailSignInLink(t *testing.T) {
 		t.Fatalf("AuthForTenant() = %v", err)
 	}
 
-	link, err := client.EmailSignInLink(context.Background(), testEmail, testActionCodeSettings)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if link != testActionLink {
-		t.Errorf("EmailSignInLink() = %q; want = %q", link, testActionLink)
-	}
+	cases := []bool{true, false}
+	testActionCodeSettingsCustom, testActionCodeSettingsMapCustom := getCopiesOfTestSettings(testActionCodeSettings,
+		testActionCodeSettingsMap)
+	for _, returnOobLink := range cases {
+		testActionCodeSettingsCustom.SendEmailLink = !returnOobLink
+		testActionCodeSettingsMapCustom["returnOobLink"] = returnOobLink
+		link, err := client.EmailSignInLink(context.Background(), testEmail, testActionCodeSettingsCustom)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if link != testActionLink {
+			t.Errorf("EmailSignInLink() = %q; want = %q", link, testActionLink)
+		}
 
-	want := map[string]interface{}{
-		"requestType":   "EMAIL_SIGNIN",
-		"email":         testEmail,
-		"returnOobLink": true,
-	}
-	for k, v := range testActionCodeSettingsMap {
-		want[k] = v
-	}
-	if err := checkActionLinkRequestWithURL(want, wantEmailActionURL, s); err != nil {
-		t.Fatalf("EmailSignInLink() %v", err)
+		want := map[string]interface{}{
+			"requestType": "EMAIL_SIGNIN",
+			"email":       testEmail,
+		}
+		for k, v := range testActionCodeSettingsMapCustom {
+			want[k] = v
+		}
+		if err := checkActionLinkRequestWithURL(want, wantEmailActionURL, s); err != nil {
+			t.Fatalf("EmailSignInLink() %v", err)
+		}
 	}
 }