Frequently asked questions

Use the “Forgot password” option on the sign-in page. The recovery process uses the contact method stored for your account.

If you no longer have access to it, use the contact form. Never send us an old or current password.

• Use your full email address as the username.
• Type the password manually and avoid outdated browser entries.
• Check Caps Lock, keyboard layout and accidental spaces.
• If needed, try a private browser window or another current browser.

If you no longer know the password, use password recovery.

Use your full email address as the username together with your personal mailbox password.

The same credentials are used when setting up email applications unless a guide explicitly states otherwise.

It can make future sign-ins easier on your own trusted device. Do not use it on public, shared or unfamiliar devices.

Sessions may end for security reasons or after extended inactivity. Deleted or blocked cookies can also require a new sign-in.

If this happens unusually often, try a private browser window and review extensions that block cookies or scripts.

After signing in, change your password in account management. Use a long, unique password and save the change.

Then update the new password on every smartphone, tablet and email application that accesses this mailbox.

Account management is available in the mailbox under Settings → Membership. Before closing an account, save any email, contacts or files you still need.

1. Check Spam/Junk and your own filter rules.
2. Search for the sender address or subject.
3. Ask the sender whether a delivery failure notice was returned.
4. Check that your mailbox still has sufficient free storage.

First test sending directly in Webmail. If it works there, the cause is likely in the external email application settings.

Check the SMTP server, port, encryption, full username and enabled SMTP authentication.

A bounce is generated by a participating mail system and normally contains a technical reason. Common causes include an invalid recipient address, a full destination mailbox, rejection by the recipient server or a message exceeding the recipient system limits.

Email delivery passes through multiple systems. Temporary problems, greylisting, queues or external filters can delay delivery. For persistent issues, note the sender, recipient and approximate sending time.

Check your own filter rules, forwarding settings and spam classification. Automatic rules can move messages before you see them in the inbox.

If the feature is enabled for your account, forwarding can be configured in mailbox settings. Check the destination address carefully and test it afterwards with a non-sensitive message.

Yes. The out-of-office feature can send temporary automatic replies. Keep the message concise and avoid unnecessary personal information.

Sign in through the browser and test the same action in Webmail. If sending and receiving work there, review the external application settings next. If the problem also occurs in Webmail, note the time and exact error message for support.

For new setups we recommend IMAP.

• Incoming: IMAP · 24-mail.com · port 993 · SSL/TLS
• Outgoing: SMTP · 24-mail.com · port 587 · STARTTLS
• Username: full email address
• Password: mailbox password
• SMTP authentication: enabled

See email setup for dedicated step-by-step guides.

IMAP is recommended when you use several devices because folders and message status are synchronized with the server. POP3 is more suitable for workflows that primarily download messages to one device.

Store the new password on every configured device and in every email application. Old saved credentials can otherwise cause repeated password prompts or send/receive errors.

Use the relevant instructions under email setup.

• Username = full email address.
• Enter the password manually again.
• Compare IMAP/SMTP servers, ports and encryption with the setup page.
• SMTP authentication must be enabled.
• Check whether the same credentials work in Webmail.

With IMAP, server folders and message status are synchronized. Differences often occur when one device uses POP3, local folders are used, or synchronization is paused in the application.

Check the internet connection, username and password and test the account in Webmail. Then compare the account settings with our guides under email setup. If a clean setup is required, back up any locally stored data first.

First check that all important messages are visible in Webmail. Then set up the account on the new device preferably using IMAP. Use the matching guide under email setup.

Protect your account with a strong password used only for this service, sign out completely on unfamiliar devices, and save credentials only on trusted devices. The mailbox also uses server-side spam and security functions.

Use a long, unique password that you do not reuse elsewhere. If you suspect unauthorized access, change it immediately and then update all connected email applications.

Change your password immediately, sign in again, and review forwarding, filters and account settings for unfamiliar changes. If you can no longer sign in, use password recovery or the contact form.

The current service description lists up to 120 MB for attachments when sending and receiving. The recipient or their provider may apply a smaller limit.

In addition to your own limit, the destination system limits apply. Email encoding also makes a message larger than the raw file size. For very large files, sharing through Cloud/Webdisk is often more suitable.

The service description currently lists 100 GB email storage. The actual quota shown in your mailbox is always authoritative for your account.

Cloud/Webdisk is used to store, manage and share files. It is particularly useful when files are too large for regular email attachments or should be shared separately from an email thread.

Review large or old messages, Trash and Spam, and files you no longer need. Then check the displayed storage usage again. Back up important content before deleting it.

Try the download in a current browser and check whether the browser or security software blocks the file type. If an error appears, note the filename, approximate size and exact wording.

Yes. Filters can process messages automatically or move them to matching folders based on defined criteria. Test new rules with simple conditions first.

An alias is an additional email address assigned to your account. Depending on the configuration enabled for your account, several aliases may be available.

Yes. Personal signatures can be stored in the mailbox and used when composing messages. Keep signatures reasonably compact for good readability.

Use email search or full-text search. For recurring searches, smart folders can provide a persistent dynamic view of matching messages.

Yes. Your account includes the address book, calendar/organizer, tasks and personal notes. These areas are available directly in the mailbox.

Yes. You can use the mailbox in a mobile browser. Compatible email applications can also be configured using IMAP/SMTP.

1. Reload the page completely.
2. Try a private browser window.
3. Try another current browser or device.
4. Temporarily disable browser extensions that block scripts or cookies.
5. If the issue remains reproducible, note the exact page, time and take a screenshot.

Please provide the affected email address, approximate time, exact page or function, full error message and the device or application used. For display problems, a screenshot is helpful.

Never include your password.

No, if it concerns the same issue. Reply in the existing ticket so the history, attachments and technical details remain together.

After signing in, open Settings → Support & Help. You can see the status, replies and previous conversation there.

If mailbox access is not possible, use the public contact form. Include the affected mailbox address, but never credentials or passwords.