We have same problem:
[root@bin]# ./mail --remove
[email protected]
[2015-12-02 10:45:46] ERR [util_exec] proc_close() failed ['/usr/local/psa/admin/bin/mail_responders_control' '--del-resp' '--mailname' '
[email protected]'] with exit code [1] <- tries to delete alias?
Error occured while...