Hi,
You could try replacing your grok expression with this:-
Customer\sAccount\sNumber\=(?<customer_account_number>\d*)\sContract\sNumber\=(?<contract_number>\w*)\sWork\sNumber\=(?<work_number>\w*)\sStatus\=(?<status>\w*)\scftsFileName\=(?<cfts_filename>.*?(?=\s))\semailRecipients\=(?<email_recipients>.*)