diff --git a/app/api/mail/mark-read/route.ts b/app/api/mail/mark-read/route.ts
index 2527400d..ecdca57a 100644
--- a/app/api/mail/mark-read/route.ts
+++ b/app/api/mail/mark-read/route.ts
@@ -8,7 +8,9 @@ export async function POST(request: Request) {
   let client: ImapFlow | null = null;
   try {
     const session = await getServerSession(authOptions);
+    
     if (!session?.user?.id) {
+      console.error('No session or user ID found');
       return NextResponse.json(
         { error: 'Unauthorized' },
         { status: 401 }
@@ -18,6 +20,7 @@ export async function POST(request: Request) {
     const { emailId, isRead } = await request.json();
     
     if (!emailId || typeof isRead !== 'boolean') {
+      console.error('Invalid request parameters:', { emailId, isRead });
       return NextResponse.json(
         { error: 'Invalid request parameters' },
         { status: 400 }
@@ -29,7 +32,16 @@ export async function POST(request: Request) {
     const folder = url.searchParams.get('folder') || 'INBOX';
 
     try {
+      // Initialize IMAP client with user credentials
       client = await getImapClient();
+      if (!client) {
+        console.error('Failed to initialize IMAP client');
+        return NextResponse.json(
+          { error: 'Failed to initialize email client' },
+          { status: 500 }
+        );
+      }
+
       await client.connect();
       await client.mailboxOpen(folder);
 
@@ -40,6 +52,7 @@ export async function POST(request: Request) {
       });
 
       if (!message) {
+        console.error('Email not found:', emailId);
         return NextResponse.json(
           { error: 'Email not found' },
           { status: 404 }