The following must be observed at all times: The DPO is obligated to maintain confidentiality within the scope of his/her activities pursuant to Art. 38 GDPR, §§ 6, 38 BDSG. This confidentiality obligation also applies to the responsible body, including the management and any data protection coordinators! In particular, this applies to the identity and concerns of data subjects (e.g., employees, customers, visitors to the website and other persons), who may contact the data protection officer at any time in accordance with Section 6 (5) BDSG while maintaining confidentiality.
For this purpose, an e-mail address, e.g. “datenschutz@”, has usually been set up and communicated in all data protection information to data subjects for contact purposes.
However, the right to confidential consultation as well as the legal obligation to ensure the availability of the DPO would be counteracted if persons other than the appointed DPO himself/herself had access to the e-mail communication, e.g., data protection coordinators or the IT of the responsible body. Of course, the accessibility of the DPO is also permanently disrupted by a simply non-functioning e-mail forwarding.