Using a not equal in SQL Case Expression

The SUBSTRING function returns @domain.com.  I don't want any results to be displayed from my sql statement if it equals @myemail.com. I'm getting an error that says invalid syntax near <

How can I fix this error? Thanks

SELECT DISTINCT CASE CUST_EMLAD_TX
      WHEN SUBSTRING(CUST_EMLAD_TX, CHARINDEX('@',CUST_EMLAD_TX), LEN(CUST_EMLAD_TX) <> '@myemail.com') THEN CUST_EMLAD_TX
	END
FROM ...