diff --git a/src/corelibs/check_handling/regex_constants.py b/src/corelibs/check_handling/regex_constants.py
index eca6013..f71603e 100644
--- a/src/corelibs/check_handling/regex_constants.py
+++ b/src/corelibs/check_handling/regex_constants.py
@@ -5,10 +5,33 @@ List of regex compiled strings that can be used
 import re
 
 
-EMAIL_REGEX_BASIC = r"""
+def compile_re(reg: str) -> re.Pattern[str]:
+    """
+    compile a regex with verbose flag
+
+    Arguments:
+        reg {str} -- _description_
+
+    Returns:
+        re.Pattern[str] -- _description_
+    """
+    return re.compile(reg, re.VERBOSE)
+
+
+# email regex
+EMAIL_BASIC_REGEX = r"""
 ^[A-Za-z0-9!#$%&'*+\-\/=?^_`{|}~][A-Za-z0-9!#$%:\(\)&'*+\-\/=?^_`{|}~\.]{0,63}
 @(?!-)[A-Za-z0-9-]{1,63}(?<!-)(?:\.[A-Za-z0-9-]{1,63}(?<!-))*\.[a-zA-Z]{2,6}$
 """
-EMAIL_REGEX_BASIC_COMPILED = re.compile(EMAIL_REGEX_BASIC)
+# Domain regex with localhost
+DOMAIN_WITH_LOCALHOST_REGEX = r"""
+^(?:localhost|(?!-)[A-Za-z0-9-]{1,63}(?<!-)(?:\.[A-Za-z0-9-]{1,63}(?<!-))*\.[A-Za-z]{2,})$
+"""
+# domain regex with loclhost and optional port
+DOMAIN_WITH_LOCALHOST_PORT_REGEX = r"""
+^(?:localhost|(?!-)[A-Za-z0-9-]{1,63}(?<!-)(?:\.[A-Za-z0-9-]{1,63}(?<!-))*\.[A-Za-z]{2,})(?::\d+)?$
+"""
+# Domain, no localhost
+DOMAIN_REGEX = r"^(?!-)[A-Za-z0-9-]{1,63}(?<!-)(?:\.[A-Za-z0-9-]{1,63}(?<!-))*\.[A-Za-z]{2,}$"
 
 # __END__
diff --git a/src/corelibs/config_handling/settings_loader_handling/settings_loader_check.py b/src/corelibs/config_handling/settings_loader_handling/settings_loader_check.py
index 9ed16f9..ab9ff42 100644
--- a/src/corelibs/config_handling/settings_loader_handling/settings_loader_check.py
+++ b/src/corelibs/config_handling/settings_loader_handling/settings_loader_check.py
@@ -3,7 +3,9 @@ Class of checks that can be run on value entries
 """
 
 from typing import TypedDict
-from corelibs.check_handling.regex_constants import EMAIL_REGEX_BASIC
+from corelibs.check_handling.regex_constants import (
+    EMAIL_BASIC_REGEX, DOMAIN_WITH_LOCALHOST_REGEX, DOMAIN_WITH_LOCALHOST_PORT_REGEX, DOMAIN_REGEX
+)
 
 
 class SettingsLoaderCheckValue(TypedDict):
@@ -45,27 +47,25 @@ class SettingsLoaderCheck:
         },
         # This does a baisc email check, only alphanumeric with special characters
         "string.email.basic": {
-            "regex": EMAIL_REGEX_BASIC,
+            "regex": EMAIL_BASIC_REGEX,
             "regex_clean": None,
             "replace": "",
         },
         # Domain check, including localhost no port
         "string.domain.with-localhost": {
-            "regex": r"^(?:localhost|(?!-)[A-Za-z0-9-]{1,63}(?<!-)(?:\.[A-Za-z0-9-]{1,63}(?<!-))*\.[A-Za-z]{2,})$",
+            "regex": DOMAIN_WITH_LOCALHOST_REGEX,
             "regex_clean": None,
             "replace": "",
         },
         # Domain check, with localhost and port
         "string.domain.with-localhost.port": {
-            "regex": r"""
-            ^(?:localhost|(?!-)[A-Za-z0-9-]{1,63}(?<!-)(?:\.[A-Za-z0-9-]{1,63}(?<!-))*\.[A-Za-z]{2,})(?::\d+)?$
-            """,
+            "regex": DOMAIN_WITH_LOCALHOST_PORT_REGEX,
             "regex_clean": None,
             "replace": "",
         },
         # Domain check, no pure localhost allowed
         "string.domain": {
-            "regex": r"^(?!-)[A-Za-z0-9-]{1,63}(?<!-)(?:\.[A-Za-z0-9-]{1,63}(?<!-))*\.[A-Za-z]{2,}$",
+            "regex": DOMAIN_REGEX,
             "regex_clean": None,
             "replace": "",
         },