UTL_MAIL error: utl_mail must be declared

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General
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Below error is coming when executing procedure inside UTL_MAIL package:
UTL_MAIL error: utl_mail must be declared

Most likely, the permissions are missing

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UTL_MAIL
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SELECT owner, object_name, object_type 

FROM DBA_OBJECTS 

WHERE object_name = 'UTL_MAIL';

OWNER      OBJECT_NAME                    OBJECT_TYPE
---------- ------------------------------ --------------------
SYS        UTL_MAIL                       PACKAGE BODY
SYS        UTL_MAIL                       PACKAGE
PUBLIC     UTL_MAIL                       SYNONYM

connect as sysdba, and grant missing permission to users:

 sqlplus / as sysdba

SQL> GRANT EXECUTE ON UTL_MAIL TO NEW_USER;

Grant succeeded.

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UTL_MAIL permissions 
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Current status:

SELECT * FROM DBA_TAB_PRIVS WHERE owner = 'SYS' AND table_name LIKE '%MAIL%'

GRANTEE             OWNER      TABLE_NAME        GRANTOR    PRIVILEGE  GRANTABLE HIERARCHY

------------------- ---------- ----------------- ---------- ---------- --------- --

PUBLIC              SYS        UTL_MAIL_INTERNAL SYS        EXECUTE    NO        NO

VIPCREATOR          SYS        UTL_MAIL          SYS        EXECUTE    YES       NO

GBR_VIRGI_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

NGA_MTNNG_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

RWA_TIGOR_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

BGR_MOBIL_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

GNB_MTNGN_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

GHA_TIGOG_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

BFA_TELEC_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

BWA_BTCQQ_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

COG_MTNCO_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

COD_TIGOC_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

GNQ_HITSE_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

COG_AIRTE_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

LBR_LONES_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

MWI_AIRTE_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

KOR_LGTEL_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

BEN_MOOVB_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

BEN_MTNBE_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

COL_ETBCO_XXXXX     SYS        UTL_MAIL          VIPCREATOR EXECUTE    NO        NO

Generate SQL command to grant this permission to all user who do not have it

SELECT 'GRANT EXECUTE ON UTL_MAIL TO '|| username||';' FROM (

SELECT username as username FROM all_users

MINUS

SELECT grantee as username FROM DBA_TAB_PRIVS 

 WHERE owner = 'SYS' AND table_name LIKE '%MAIL%'

)

GRANT EXECUTE ON UTL_MAIL TO AUT_THREE_XXXXX;

GRANT EXECUTE ON UTL_MAIL TO AUT_THREE_XXXXX;

GRANT EXECUTE ON UTL_MAIL TO AUT_THREE_XXXXX;

GRANT EXECUTE ON UTL_MAIL TO AUT_THREE_XXXXX;

GRANT EXECUTE ON UTL_MAIL TO BDI_ECONE_XXXXX;

GRANT EXECUTE ON UTL_MAIL TO BDI_ECONE_XXXXX;