diff --git a/src/core/operations/RegularExpression.mjs b/src/core/operations/RegularExpression.mjs
index 9ea17e83..660f250d 100644
--- a/src/core/operations/RegularExpression.mjs
+++ b/src/core/operations/RegularExpression.mjs
@@ -45,7 +45,7 @@ class RegularExpression extends Operation {
                     },
                     {
                         name: "Email address",
-                        value: "(?:[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9](?:[\\u00A0-\\uD7FF\\uE000-\\uFFFF-a-z0-9-]*[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9])?\\.)+[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9](?:[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9-]*[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9])?|\\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\\.){3}\\])"
+                        value: "(?:[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9](?:[\\u00A0-\\uD7FF\\uE000-\\uFFFF-a-z0-9-]*[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9])?\\.)+[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9](?:[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9-]*[\\u00A0-\\uD7FF\\uE000-\\uFFFFa-z0-9])?|\\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\\])"
                     },
                     {
                         name: "URL",
diff --git a/tests/operations/tests/Regex.mjs b/tests/operations/tests/Regex.mjs
index a8697d46..60804801 100644
--- a/tests/operations/tests/Regex.mjs
+++ b/tests/operations/tests/Regex.mjs
@@ -55,5 +55,16 @@ TestRegister.addTests([
                 "args": ["User defined", "\\pS", true, true, false, false, true, false, "List matches"]
             }
         ],
-    }
+    },
+    {
+        name: "Regex: Email address preset matches IPv4 domain",
+        input: "user@[1.2.3.4]\ntest@[192.168.0.1]\nno-match@[1.2.3.]",
+        expectedOutput: "user@[1.2.3.4]\ntest@[192.168.0.1]",
+        recipeConfig: [
+            {
+                "op": "Regular expression",
+                "args": ["Email address", "", true, true, false, false, false, false, "List matches"]
+            }
+        ],
+    },
 ]);