We are currently experiencing an increased number of phishing e-mails that are specifically addressed to secretaries and employees – with the request of the respective professor for a reply. They then ask to buy Google Playstore (or other) vouchers.
The emails are written in English. Do not reply to such emails under any circumstances.
Always check the sender's address carefully. If something about the email seems strange to you, but you are unsure, ask the sender directly. However, do not click on “Reply”!