Faxing without a faxmachine

  • Internet connection suffices
  • GDPR compliant
  • Developer interfaces


Online customer area

No investments or installations: an access to the internet and an e-mail account will do, to send and receive in your secure cusomter area faxes from anywhere in the world.

Easy dispatch

Send directly out of your e-mail account - your fax as an attachment. Or use your online customer area. For automated processes you can use the integrated developer tools.

Your fax number

From service numbers in Germany, land line numbers in Austria and Switzerland up to international numbers: You receive all incoming faxes directly online or via e-mail.


Distribution lists

Creating or importing distribution lists for a regular dispatch to several constant recipients.

Individual fax headline

Individual fax headline and sender ID can be set individually by yourself. The number of dialing attempts can be chosen freely. 


Lists containing outgoing faxes with status, time, as well as search function and view, have optional re-send of already sent faxes.


Internet-Fax - how it works

    • Fax dispatch via e-mail
      Send and receive your faxes as a normal e-mail: as an attachment.
    • Fax dispatch from your customer area
      Send and recive your faxes directly from your customer area – quick and straightforward.
    • Fax API for your applications
      Adjust your software directly with free libraries and just a few clicks.

    ISO 27001 certified

    With InterFAX, your data is safe - and guaranteed! Because the InterFAX service has been ISO 27001 certified by Certification Europe. The ISO 27001 certification is an internationally recognized and high data security standard. This standard covers all requirements of an information security management system (ISMS).



    [Translate to English:] ISO27001 Zertifizierung für InterFAX

    Your advantages

    • Protection of confidential data
    • Secure communication
    • Compliance with strict data protection regulations (EU GDPR)
    • Uniform security structure
    • Minimization of risk sources



    Christine Fröhler

    Communication Consultants GmbH

    "We really appreciate the newsletter tool because we jsut know that everything will be on point"


    Martina Assenmacher

    Ingram Micro Pan Europe GmbH

    "The sending of our newsletter takes only a few minutes – nevertheless it is handled in a very professional way. We are not in need of additional software and do not have to enter a long term commitment. That’s how we stay flexible. Furthermore we really appreciate the support of the attentive GTC-employees."


    Uwe Streb

    Festina Uhren GmbH

    "The customer service gave us great advice. Now we are getting much more out of our actions, can make campaign comparisons and achieve exactly what we want."


    Jürgen Klein

    DATEV eG

    "GTC is our long-standing partner for sms and e-mail boradcasting and is very reliable. Thumbs up."


    Edgar Augel

    Stadtmobil carsharing AG

    "E-mailings created with the template editor look great. In addition, our mailings now always adapt to the size of the receivers with responsive design. Fantastic."


    Roland M. Rupp

    Schweizerischer KMU Verband

    "The service at GTC leaves nothing to be desired. Also the simple operation, the evaluation and the multilingual menu is great."


    Christof Korr

    CreditPlus Bank AG

    "An sms will not be overlooked. Therefore, sms-mailing is our choice when it matters. With GTC, we have found a professional, with which everything runs great. And what is especially important to us is that all data remain in Germany."

    Among our satisfied customers
    Datev grossKlett-Cotta großBosch großCewe colorDHL großFestinaAachen Münchener großCosAG großDeguDent großLawinen-Warndienst Bayern großSVS großWeka großIngram großIvacare Aquatec großAmnesty International großDer deutsche Wirtschaftsbrief großCommunication Consultanst GmbH großUmwelttechnik BW
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