1 files changed, 7 insertions, 0 deletions
diff --git a/src/modules/internet/index.ts b/src/modules/internet/index.ts
index 2623f8b3..c0355209 100644
--- a/src/modules/internet/index.ts
+++ b/src/modules/internet/index.ts
@@ -109,6 +109,13 @@ export class InternetModule {
       );
     }
 
+    // local parts may not contain two or more consecutive . characters
+    localPart = localPart.replace(/\.{2,}/g, '.');
+
+    // local parts may not start with or end with a . character
+    localPart = localPart.replace(/^\./, '');
+    localPart = localPart.replace(/\.$/, '');
+
     return `${localPart}@${provider}`;
   }