Owing to a malicious IT attack, any messages sent to @interholco.com e-mail addresses have not been delivered since Tuesday 19 February 2019. Our business remains, however, active and operational, as usual.

Until further notice, please send any e-mail communication to this temporary e-mail address: This email address is being protected from spambots. You need JavaScript enabled to view it. .
You can also contact us, as always, on our business telephone numbers, including +41 41 767 03 03; or, our mobile phone numbers (also WhatsApp) and/or Skype.

Please check this page regularly for any updates.