These are separate providers with separate rules. The settings for one will never work for another. Find your address below and use only that block.
For two of them the password is the whole problem. Telekom (t-online.de) and Vodafone (arcor.de, kabelmail.de) both require a second, separate email password that you set yourself on their website. It is not the password you use to sign in to their website or customer portal, and entering that one is the most common reason adding the account fails.
Using GMX, web.de or mail.de? Those are different providers with their own switches — see How to add GMX accounts and How to Add web.de and mail.de Accounts.
T-Online (@t-online.de and @magenta.de)
Start here: you need a Passwort für E-Mail-Programme
Telekom does not let a mail app sign in with your Telekom Login password. Its help says that if you read your mail anywhere other than the E-Mail Center website or the Telekom Mail App — so in Outlook, Thunderbird, Apple Mail, the Gmail app or BlueMail — you need a Passwort für E-Mail-Programme (password for email programs).
If you have never set one, there is no password for BlueMail to use yet, and setup fails no matter how carefully you type. Set or change it by either route:
- In the Kundencenter: Profil verwalten | Login-Daten | Weitere Passwörter.
- In the E-Mail Center: the gear icon (Einstellungen) | Alle Einstellungen anzeigen | Passwörter | Passwort für E-Mail-Programme.
Telekom advises making it different from your Telekom Login password. Then use it as the password in BlueMail, with your full email address as the username.
Telekom's own instructions: Passwort für E-Mail-Programme verwalten.
T-Online server settings
| Server | Port | Security | |
|---|---|---|---|
| Incoming (IMAP) | secureimap.t-online.de | 993 | SSL |
| Incoming (POP3) | securepop.t-online.de | 995 | SSL or TLS |
| Outgoing (SMTP) | securesmtp.t-online.de | 465 or 587 | SSL |
Telekom lists both 465 and 587 for sending, so if one is refused, try the other. Source: Posteingangsserver & Postausgangsserver.
Arcor, kabelmail and other Vodafone addresses
Vodafone runs the mailboxes behind @arcor.de, @kabelmail.de, @vodafonemail.de and the old Kabel Deutschland and Unitymedia addresses. Vodafone publishes one set of servers for all of them: "Diese Einstellungen gelten für alle E-Mail-Konten von Vodafone, Arcor, Kabel Deutschland und Unitymedia."
So there are no arcor.de or kabelmail.de servers to enter any more. If your account still holds older server names, replace them with the ones in the table below.
Start here: the E-Mail-/IMAP-Passwort
Vodafone is explicit that this is a different password from the one you log in to MeinVodafone with: the E-Mail-/IMAP-Passwort (also called the IMAP/POP3 password) is what external mail programs need. Your internet password will be rejected.
- Forgotten it? Go to mail.vodafone.de, and click Zugangsdaten vergessen under the login button.
- Want to change it? Sign in to your email account, click your name at the top right, choose Einstellungen, then Mein Konto | Passwort | Bearbeiten. The new password applies immediately — update it in BlueMail too.
Vodafone server settings
| Server | Port | Security | |
|---|---|---|---|
| Incoming (IMAP) | imap.vodafonemail.de | 993 | SSL |
| Incoming (IMAP), alternative | imap.vodafonemail.de | 143 | TLS |
| Incoming (POP3) | pop3.vodafonemail.de | 995 | SSL |
| Outgoing (SMTP) | smtp.vodafonemail.de | 465 | SSL |
| Outgoing (SMTP), alternative | smtp.vodafonemail.de | 587 | TLS |
Use your full email address as the username. Encryption is mandatory — Vodafone made TLS compulsory in October 2024, so a setup without it will not connect at all.
Vodafone's own page: Hilfe zu Vodafone E-Mail & Cloud.
freenet.de
Start here: POP3, IMAP and SMTP must be switched on
freenet actively recommends keeping mail-app access off, so on many mailboxes it is off — and while it is off, nothing can connect. Turn it on in freenet Mail in a browser:
- Sign in at mail.freenet.de.
- Click the gear icon at the top right to open Einstellungen (Settings).
- Under POP3/IMAP/SMTP, choose Einrichtung POP3/IMAP.
- Tick the checkbox POP3, IMAP und SMTP aktivieren.
This switch is on freenet's website, not in BlueMail.
freenet server settings
| Server | Port | Security | |
|---|---|---|---|
| Incoming (IMAP) | mx.freenet.de | 993 | SSL/TLS |
| Incoming (IMAP), alternative | mx.freenet.de | 143 | STARTTLS |
| Outgoing (SMTP) | mx.freenet.de | 587 | STARTTLS |
| Outgoing (SMTP), alternative | mx.freenet.de | 465 | SSL/TLS |
Incoming and outgoing use the same server name. Encryption is required, SMTP authentication must be on, and the username is your full address, for example max.mustermann@freenet.de. freenet asks you to use only these names — no IP addresses and no other host names.
There is no separate app password for freenet. Use the same password you sign in to freenet Mail with. freenet also publishes no POP3 server and recommends IMAP instead, so choose IMAP.
freenet's own instructions: Einstellungen (Serverdaten) für alle E-Mail-Programme and POP3, IMAP und SMTP aktivieren.
ok.de
Start here: IMAP/POP access is off by default
An ok.de mailbox blocks external mail apps until you allow them. In ok.de webmail in a browser:
- Sign in at login.ok.de.
- In the main menu on the left, choose Einstellungen | E-Mail | POP/IMAP.
- Click Zugriff aktivieren.
- Confirm with your profile password, then click Änderungen speichern.
The page then shows Status: Zugriff ist aktiviert.
ok.de server settings
| Server | Port | Security | |
|---|---|---|---|
| Incoming (IMAP) | imap.ok.de | 993 | SSL |
| Incoming (POP3) | pop.ok.de | 995 | SSL |
| Outgoing (SMTP) | smtp.ok.de | 587 | STARTTLS |
| Outgoing (SMTP), alternative | smtp.ok.de | 465 | SSL |
The username is always your full email address. ok.de no longer accepts TLS 1.0 or 1.1, so a very old device or OS will be refused by the server.
ok.de's own instructions: Einstellungen für IMAP, POP3 und SMTP.
o2mail.de and o2online.de
We can't give you these. o2 does not publish server settings in its own help pages — the only values we could find are in posts on the o2 community forum, and they contradict each other. A wrong host or port just fails again, so ask o2 support for the current IMAP and SMTP values for your mailbox, then enter them by hand as below.
Where these go in BlueMail
Try the normal sign-in first. On the password screen, Allow BlueMail to auto-detect the server details of your account is ticked by default — leave it ticked and tap Next. If that works, you're done.
If BlueMail can't find the details, enter them by hand:
- First account? Tap Continue, type your email address, tap Sign in, then tap Having trouble? Manual Setup under the Sign in button. Already have an account in BlueMail? Go to Settings | Accounts | Add Account.
- On the Choose provider screen, tap Manual Setup at the bottom.
- Choose IMAP (or POP3, where the table above lists one).
- Fill in the form — it holds the server, Security and Port fields. Pick SSL, TLS or STARTTLS in the Security dropdown to match the table above, and use your full email address as the username.
Full walkthrough: Configuring your account manually.
It worked before and stopped
t-online.de and Vodafone addresses: check the email password, not the website one. Changing your Telekom Login or MeinVodafone password does not change it — but if you did change the email password itself, BlueMail is still sending the old one.
freenet.de: check that POP3, IMAP und SMTP aktivieren is still ticked.
To update a password or server details on an account you already have, go to Settings | Accounts | [tap the account] | Incoming/Outgoing Settings — see Edit Account.
Still stuck? Can't Add My Account works through the other usual causes, and Connection issues, sync failures or missing emails covers accounts that added fine but won't stay connected.
