POP3:
incoming mail server: mail.edis.at
secure connection port: 995
IMAP:
incoming mail server: mail.edis.at
secure connection port: 993
SMTP:
outgoing mail server: mailrelay.edis.at
secure ports: 587 (StarTLS) or 465 (secure SSL)
You should use your email address and password to receive emails but also to authenticate the outgoing emails.