ORACLE SQL: Add a count to query

Experts,

Can someone please help me out with my SQL statement?  My SQL output is showing 4 different ticket ID's but I want it to use the count feature.  Should show just the number 4.

Thanks!!

Using Oracle 10g

(SELECT DISTINCT (RELATED_TICKET_ID)
FROM ARADMIN.EMAIL_REPORTING 
WHERE UDF_CONVERT_UNIX_DATETIME(CREATE_DATE, 'US/Eastern') >= (TRUNC(SYSDATE) - INTERVAL '1' DAY) 
    AND UDF_CONVERT_UNIX_DATETIME(CREATE_DATE, 'US/Eastern') < (TRUNC(SYSDATE) - INTERVAL '0' DAY) 
    AND MESSAGE_TYPE = 1 
    AND OWNER_GROUP = 'National-Carrier Operations'
    AND RELATED_TICKET_ID LIKE 'MNT%'
OR UDF_CONVERT_UNIX_DATETIME(CREATE_DATE, 'US/Eastern') >= (TRUNC(SYSDATE) - INTERVAL '1' DAY) 
    AND UDF_CONVERT_UNIX_DATETIME(CREATE_DATE, 'US/Eastern') < (TRUNC(SYSDATE) - INTERVAL '0' DAY) 
    AND MESSAGE_TYPE = 0 
    AND OWNER_GROUP = 'National-Carrier Operations'
AND RELATED_TICKET_ID LIKE 'MNT%' 
    AND MAILBOX_NAME IS NOT NULL)

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