This site did not show evidence of storing passwords in plaintext.
This site does allow secured connections (https)
This site did show a clear way to unsubscribe from their emails
This site does verify your email address.
Below is a sample of the emails you can expect to receive when signed up to eubis.
EUBIS - European IT, Business Process & RPA Services Directory
Welcome to EUBIS – European Business Process, IT and RPA Services Directory! Thank you for signing up with EUBIS – European Business Process, IT and RPA Services Directory. Click the following link to confirm your account: https://eubis.org/confirmation/?code=1592476431:$P$BQdS7FVcVi/KqZE5stJha8k0MvGhNu0.
Best Regards, Member services Deutscher Outsourcing Verband e.V. (German Outsourcing Association) http://www.outsourcing-verband.org