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T-Online (Deutsche Telekom) Email Settings

Last updated: February 21, 2026

How to connect your T-Online (Deutsche Telekom) email account (t-online.de) to InflowMail.

Server Settings

Incoming Mail (IMAP)

Server
secureimap.t-online.de
Port
993
Security
SSL/TLS

Outgoing Mail (SMTP)

Server
securesmtp.t-online.de
Port
465
Security
SSL/TLS

App Password Required

T-Online (Deutsche Telekom) requires an app-specific password instead of your regular account password. This is a security feature that lets you grant limited access to third-party apps.

Generate App Password

Supported Domains

These email domains use T-Online (Deutsche Telekom)'s servers and will be automatically detected by InflowMail:

@t-online.de

Notes

Create an email password in T-Online customer center.

How to Connect T-Online (Deutsche Telekom) to InflowMail

  1. 1 Create an InflowMail account or sign in to your existing account.
  2. 2 Go to Settings > Connected Accounts and click Add Account.
  3. 3 Select IMAP and enter your t-online.de email address. InflowMail will auto-detect the server settings.
  4. 4 Enter the app password you generated (not your regular password).
  5. 5 Your emails will start syncing immediately. The initial sync may take a few minutes for large mailboxes.

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