Use APKPure App
Get WebSMS: GMX Connector old version APK for Android
إرسال TXT عبر GMX.
Send TXT via GMX.
Fetch WebSMS from market to make this connector work.
Please post issues on apps's website.
** GMX is very unrliable. Sometimes SMS need some hours to arrive. Sometimes GMX Service is down for weeks. DO NOT blame the app/connector. **