EIMS workaround. EIMS returns the SEARCH response as multiple untagged SEARCH responses. That is against RFC3501 !!!
example:

A005 UID SEARCH UID 1:*
* SEARCH 5949 8160 8401 8402 8413 8470 8471 8472 8497 8499
* SEARCH 8502 8504 8514
A005 OK SEARCH completed

We only use that call in case of non server side sorting.