At present questionable invoices issued by ".DE Deutsche Domain", which claims to be a provider of domain registration services, are in circulation. These invoices are not related to DENIC in any respect.
12 April 2016: Thunderbird 45 Now Also IDNA-Compatible Due To DENIC Source Code Donation
DENIC has contributed part of the code for the new version 45 of the free e-mail client Mozilla Thunderbird, which was launched on 12 April 2016: Thanks to this, Thunderbird now supports more special characters (IDNs) in e-mail addresses.
8 March 2016: DENIC Contributes Source Code for the Use of the German Letter "Eszett" ("ß") in Firefox 45
DENIC has contributed part of the code for the new version 45 of the Mozilla Firefox web browser, which was launched on 8 March 2016: Thanks to this, Firefox users can now address domains containing certain IDNs like the German "ß".