Krantz / Docs

GMX Protocol

Available on Pro plan only

GMX validates credentials for GMX and web.de email accounts using their web mail interface.

What is GMX?

GMX (Global Message eXchange) is a major European email provider operating gmx.com, gmx.net, gmx.de, gmx.at, and gmx.ch. Rather than standard IMAP/POP3, Krantz Mail connects through GMX’s web mail interface using their Wicket AJAX authentication flow and navigator session system.

Supported Domains

The GMX protocol is automatically selected for these domains:

  • gmx.com
  • gmx.net
  • gmx.de
  • gmx.at
  • gmx.ch

No manual configuration is needed — Krantz Mail detects these domains and routes them through the GMX protocol automatically.

Features

FeatureSupported
Credential checkYes
Inbox searchYes
Mail viewerNo
Profile extractionNo

Limitations

  • No mail viewer support — the viewer tab does not work with GMX accounts. Use IMAP as a fallback if you need the viewer.
  • No profile extraction — GMX does not expose profile data through its web interface.
  • 2FA detection — accounts with two-factor authentication enabled are correctly identified.
  • Password change detection — accounts requiring a password change are flagged.

Plan Requirements

PlanGMX Access
Air-
ProYes