missing dns records after migration

[broncop]

hello.

after migrating data from plesk 9.5.4 server to a new version 11 server i noticed that some dns entries were not migrated.
for example domainkey and mail. records. ...but only some domainkey or mail. records!
how many entries are gone, I can not say. ...i can only make random checks, because we talk about over 1000 domains.
how can I be sure that all entries have been correctly migrated?

regards
broncop