Hi comerciae,
you should be able to list all eMail - accounts and their plain passwords with the command:
/usr/local/psa/admin/sbin/mail_auth_view
To repair any missing file or configuration, you would use:
/usr/local/psa/admin/sbin/mchk --with-spam
With Plesk 12.5.30, you now have the option to use "
Plesk Self Repair Utility" as well.
Additional notice: Because you missed to inform us about your operating system and your current Plesk version ( incl. MU ) and possible installed Plesk packages, my answer is based for an Ubuntu 14.04 system with Plesk 12.5.30 ( all free packages installed ). Please try to inform us with your next post/thread about your operating system as well, to get a more specific answer and keep in mind, that the more basic information you provide, the better will be the answers for you.
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