The University has implemented an autoconfiguration for mainstream E-mail clients. With those clients supplying an E-mail address and a password should be sufficient.
For manual configuration please use the imap- or smtp- server.
smtp: smtp.oth-aw.de port 465 or 587 (SSL), port 25 (TLS)
imap: imap.oth-aw.de port 993 (SSL)
As for credentials please use your E-mail address and your password.
Important notice: SSL/TLS have to be active!