call_handlers: DEFER during call ‘/usr/local/psa/handlers/info/05-grey-tqyVhg/executable’ handler OR Message cannot be delivered and error “Unable to stat entry

Error:

call_handlers: DEFER during call ‘/usr/local/psa/handlers/info/05-grey-tqyVhg/executable’ handler

OR

Message cannot be delivered and error “Unable to stat entry ‘/usr/local/psa/handlers/info/10-spam-0gemCa/executable’

You see the above error message in the mail logs because the configuration of the handlers i.e. 10-spam-0gemCa are broken. In this case, you need to either delete them OR move them elsewhere so that you can recreate the configuration by using the ‘mchk’ utility of Plesk

Solution:

1. Stop the mail service

# /usr/local/psa/admin/sbin/mailmng --stop-service

OR

# service qmail stop

2. Backup old handlers in a temporary directory

# mkdir /usr/local/temp

# cp -a /usr/local/psa/handlers/before-* /usr/local/temp/
# cp -a /usr/local/psa/handlers/info /usr/local/temp/

3. Remove the handlers

# rm -rf /usr/local/psa/handlers/before-*/*
# rm -rf /usr/local/psa/handlers/info/*

4. Recreate handlers using mchk utility

# /usr/local/psa/admin/sbin/mchk --with-spam

5. Start mail service:

# /usr/local/psa/admin/sbin/mailmng --start-service

OR

service qmail start

BTW, the path to mailogs is /usr/local/psa/var/log/maillog.