remove trailing "/" from folder names

backend/src/controllers/imap.helpers.ts

@@ -178,10 +178,10 @@ export function sanitizeImapInput(input: string): string {
   }
   // Remove CRLF characters to prevent injection
   const sanitized = input.replace(/[\r\n]+/g, '');
-  // Remove dangerous IMAP special characters
-  const safeInput = sanitized.replace(/[{}()"\\*]/g, '');
+  // Escape trailing folder separator (if present)
+  const cleaned = sanitized.replace(/\/$/, '');
   // Strip leading and trailing whitespace
-  const trimmedInput = safeInput.trim();
+  const trimmedInput = cleaned.trim();
 
   if (trimmedInput.length > 255) {
     // exceeds max length defined in RFC

backend/src/services/imap/ImapEmailsFetcher.ts

@@ -117,6 +117,15 @@ export default class ImapEmailsFetcher {
         (folder) => !EXCLUDED_IMAP_FOLDERS.includes(folder)
       );
 
+      logger.debug(
+        `[${this.constructor.name}:getTotalMessages] fetching total messages`,
+        {
+          miningId: this.miningId,
+          email: this.userEmail,
+          folders: this.folders
+        }
+      );
+
       const totalPromises = folders.map(
         (folder) =>
           new Promise<number>((resolve, reject) => {
@@ -151,7 +160,12 @@ export default class ImapEmailsFetcher {
         });
       });
     } catch (err) {
-      logger.error('Failed fetching total messages', err);
+      logger.error('Failed fetching total messages', {
+        miningId: this.miningId,
+        email: this.userEmail,
+        folders: this.folders,
+        error: err
+      });
       throw err;
     } finally {
       if (imapConnection) {

backend/test/unit/imapHelpers.test.ts

@@ -78,10 +78,6 @@ describe('sanitizeImapInput', () => {
     expect(sanitizeImapInput('')).toBe('');
   });
 
-  it('should return an empty string for inputs with only special characters', () => {
-    expect(sanitizeImapInput('{*()}')).toBe('');
-  });
-
   it('should return valid input without changes', () => {
     expect(sanitizeImapInput('ValidFolderName')).toBe('ValidFolderName');
   });
@@ -90,25 +86,11 @@ describe('sanitizeImapInput', () => {
     expect(sanitizeImapInput('Folder-Name_123')).toBe('Folder-Name_123');
   });
 
-  it('should strip out IMAP injection characters', () => {
-    expect(sanitizeImapInput('Folder{Name}')).toBe('FolderName');
-    expect(sanitizeImapInput('Folder(Name)')).toBe('FolderName');
-    expect(sanitizeImapInput('Folder*Name')).toBe('FolderName');
-    expect(sanitizeImapInput('Folder\\"Name')).toBe('FolderName');
-  });
-
   it('should strip out CRLF sequences', () => {
     expect(sanitizeImapInput('Folder\r\nName')).toBe('FolderName');
     expect(sanitizeImapInput('Folder\nName')).toBe('FolderName');
   });
 
-  it('should remove special IMAP characters', () => {
-    expect(sanitizeImapInput('Folder"Name')).toBe('FolderName');
-    expect(sanitizeImapInput('Folder{Name}*Test("123")')).toBe(
-      'FolderNameTest123'
-    );
-  });
-
   it('should throw a TypeError for non-string inputs', () => {
     expect(() => sanitizeImapInput(123 as any)).toThrow(TypeError);
     expect(() => sanitizeImapInput(null as any)).toThrow(TypeError);
@@ -123,6 +105,11 @@ describe('sanitizeImapInput', () => {
     expect(sanitizeImapInput('FolderñName')).toBe('FolderñName');
   });
 
+  it('should escape the separator at the end of folder name', () => {
+    const folderName = sanitizeImapInput('folder1/');
+    expect(folderName).toBe('folder1');
+  });
+
   it('should throw an error if input exceeds maximum length', () => {
     const longInput = 'A'.repeat(256); // 256 characters
     expect(() => sanitizeImapInput(longInput)).toThrow('Max length exceeded');