Once you enter your referees’ details in the application portal, and click on "send email to referees", your referees will be sent an email with a link through which they can upload their reference letters.
It is your responsibilty to check if your referees are willing to provide a reference for you and if they have received the link to upload their reference.
Only if there is a technical problem, references may be sent directly to email@example.com, clearly marked “Reference for DAHLEM POSTDOC FELLOWSHIP 2017: lastname firstname”. “lastname firstname” in this case refers to your name. The letters should be addressed to the DRS Postdoc Fellowship Program:
DRS Postdoc Fellowship Program
Dahlem Research School
Freie Universität Berlin
They should NOT be sent by post. Only electronic reference letters will be accepted.