- Plesk Onyx for Windows
Unable to create a mailing list with the name firstname.lastname@example.org in Domains > example.com > Mail > Mailing Lists > Create Mailing List:
PLESK_ERROR: Error: Mail account 'john.doe' already exists in this domain.
The mail address with the name email@example.com already exists in the domain example.com.
Select another name which does not match the name of any existing mail address on the domain example.com.