diff --git a/litellm/proxy/management_endpoints/key_management_endpoints.py b/litellm/proxy/management_endpoints/key_management_endpoints.py
index 4d44006369b..092df92caf1 100644
--- a/litellm/proxy/management_endpoints/key_management_endpoints.py
+++ b/litellm/proxy/management_endpoints/key_management_endpoints.py
@@ -4991,7 +4991,7 @@ async def test_key_logging(
         )
 
 
-_KEY_ALIAS_PATTERN = re.compile(r"^[a-zA-Z0-9][a-zA-Z0-9_\-/\.]{0,253}[a-zA-Z0-9]$")
+_KEY_ALIAS_PATTERN = re.compile(r"^[a-zA-Z0-9][a-zA-Z0-9_\-/\.@]{0,253}[a-zA-Z0-9]$")
 
 
 def _validate_key_alias_format(key_alias: Optional[str]) -> None:
@@ -5009,7 +5009,7 @@ def _validate_key_alias_format(key_alias: Optional[str]) -> None:
 
     if not _KEY_ALIAS_PATTERN.match(key_alias):
         raise ProxyException(
-            message="Invalid key_alias format. Must be 2-255 characters, start/end with alphanumeric, and only contain a-zA-Z0-9_-/.",
+            message="Invalid key_alias format. Must be 2-255 characters, start/end with alphanumeric, and only contain a-zA-Z0-9_-/.@.",
             type=ProxyErrorTypes.bad_request_error,
             param="key_alias",
             code=400,
diff --git a/tests/test_litellm/proxy/management_endpoints/test_key_management_endpoints.py b/tests/test_litellm/proxy/management_endpoints/test_key_management_endpoints.py
index 11c80351839..a573a24e35c 100644
--- a/tests/test_litellm/proxy/management_endpoints/test_key_management_endpoints.py
+++ b/tests/test_litellm/proxy/management_endpoints/test_key_management_endpoints.py
@@ -6432,6 +6432,8 @@ class TestValidateKeyAliasFormat:
         _validate_key_alias_format("valid/alias")
         _validate_key_alias_format("a" * 255)
         _validate_key_alias_format("my-key-123")
+        _validate_key_alias_format("user/user@example.com")
+        _validate_key_alias_format("team/user@example.com")
 
     def test_validate_key_alias_format_invalid(self):
         from litellm.proxy.management_endpoints.key_management_endpoints import _validate_key_alias_format
@@ -6444,7 +6446,7 @@ class TestValidateKeyAliasFormat:
             "!",              # special char
             "-start",         # non-alphanumeric start
             "end-",           # non-alphanumeric end
-            "invalid@char",   # invalid char
+            "invalid#char",   # invalid char
             "a" * 256,        # too long
             "  leading",
             "trailing  ",