diff --git a/docs/en_US/release_notes_6_6.rst b/docs/en_US/release_notes_6_6.rst
index 433cbe1a0..8c84d16a2 100644
--- a/docs/en_US/release_notes_6_6.rst
+++ b/docs/en_US/release_notes_6_6.rst
@@ -20,6 +20,7 @@ Housekeeping
 Bug fixes
 *********
 
+| `Issue #6999 <https://redmine.postgresql.org/issues/6999>`_ -  Fixed an issue where a warning is flashed every time for an email address when authentication sources are internal and ldap.
 | `Issue #7124 <https://redmine.postgresql.org/issues/7124>`_ -  Fixed the schema diff issue where tables have different column positions and a column has a default value.
 | `Issue #7152 <https://redmine.postgresql.org/issues/7152>`_ -  Added comments column for the functions collection node.
 | `Issue #7173 <https://redmine.postgresql.org/issues/7173>`_ -  Fixed an issue where the User Management dialog is not opening.
diff --git a/web/pgadmin/authenticate/__init__.py b/web/pgadmin/authenticate/__init__.py
index 8b83f5898..c62fbe22b 100644
--- a/web/pgadmin/authenticate/__init__.py
+++ b/web/pgadmin/authenticate/__init__.py
@@ -211,10 +211,14 @@ class AuthSourceManager:
 
     def validate(self):
         """Validate through all the sources."""
+        err_msg = None
         for src in self.auth_sources:
             source = get_auth_sources(src)
-            if source.validate(self.form):
+            status, err_msg = source.validate(self.form)
+            if status:
                 return True
+        if err_msg:
+            flash(err_msg, 'warning')
         return False
 
     def authenticate(self):
diff --git a/web/pgadmin/authenticate/internal.py b/web/pgadmin/authenticate/internal.py
index 8e16c5ee3..64517cc10 100644
--- a/web/pgadmin/authenticate/internal.py
+++ b/web/pgadmin/authenticate/internal.py
@@ -54,14 +54,14 @@ class BaseAuthentication(object):
             form.email.errors = list(form.email.errors)
             form.email.errors.append(gettext(
                 self.messages('EMAIL_NOT_PROVIDED')))
-            return False
+            return False, None
         if password is None or password == '':
             form.password.errors = list(form.password.errors)
             form.password.errors.append(
                 self.messages('PASSWORD_NOT_PROVIDED'))
-            return False
+            return False, None
 
-        return True
+        return True, None
 
     def login(self, form):
         username = form.data['email']
@@ -99,10 +99,10 @@ class InternalAuthentication(BaseAuthentication):
         """User validation"""
         # validate the email id first
         if not validate_email(form.data['email']):
-            flash(self.messages('INVALID_EMAIL'), 'warning')
-            return False
+            return False, self.messages('INVALID_EMAIL')
         # Flask security validation
-        return form.validate_on_submit()
+        submit = form.validate_on_submit()
+        return submit, None
 
     def authenticate(self, form):
         username = form.data['email']
diff --git a/web/pgadmin/authenticate/kerberos.py b/web/pgadmin/authenticate/kerberos.py
index 94cb855c3..81205d654 100644
--- a/web/pgadmin/authenticate/kerberos.py
+++ b/web/pgadmin/authenticate/kerberos.py
@@ -163,7 +163,7 @@ class KerberosAuthentication(BaseAuthentication):
         return gettext("kerberos")
 
     def validate(self, form):
-        return True
+        return True, None
 
     def authenticate(self, frm):
 
diff --git a/web/pgadmin/authenticate/oauth2.py b/web/pgadmin/authenticate/oauth2.py
index 08bdfead4..935d110a7 100644
--- a/web/pgadmin/authenticate/oauth2.py
+++ b/web/pgadmin/authenticate/oauth2.py
@@ -115,7 +115,7 @@ class OAuth2Authentication(BaseAuthentication):
         return self.oauth2_config[self.oauth2_current_client]['OAUTH2_NAME']
 
     def validate(self, form):
-        return True
+        return True, None
 
     def login(self, form):
         profile = self.get_user_profile()
diff --git a/web/pgadmin/authenticate/webserver.py b/web/pgadmin/authenticate/webserver.py
index 8178dfbc9..3d4e28e35 100644
--- a/web/pgadmin/authenticate/webserver.py
+++ b/web/pgadmin/authenticate/webserver.py
@@ -74,7 +74,7 @@ class WebserverAuthentication(BaseAuthentication):
         return gettext("webserver")
 
     def validate(self, form):
-        return True
+        return True, None
 
     def get_user(self):
         username = request.environ.get(config.WEBSERVER_REMOTE_USER)