however if i use mailx -s .... its sometimes reach to my hotmail address and sometimes not even that any help please????

MYMAIL
May 18 21:26:46 voip sendmail[21949]: q4IGQkhd021949: from=asterisk, size=93681, class=0, nrcpts=1, msgid=, relay=as terisk@localhost
May 18 21:26:46 voip sendmail[21951]: q4IGQk8k021951: ... User unknown
May 18 21:26:46 voip sendmail[21949]: q4IGQkhd021949: to="AIi Raza" , ctladdr=asterisk (498/496), delay=00:00:00, xdelay=00:00:00, mailer=r elay, pri=123681, relay=voip.curemd.com. [172.16.10.20], dsn=5.1.1, stat=User un known
May 18 21:26:46 voip sendmail[21951]: q4IGQk8k021951: from=, size=93681, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=voip.curemd [17 2.16.10.20]
HOTMAIL
May 18 21:29:56 voip sendmail[21973]: q4IGTukR021973: from=asterisk, size=179772 , class=0, nrcpts=1, msgid=, relay=a sterisk@localhost
May 18 21:29:56 voip sendmail[21975]: q4IGTu6d021975: from=, size=179899, class=0, nrcpts=1, msgid=, proto=ESMTP, daemon=MTA, relay=voip.curemd [172.16.10.20]
May 18 21:29:56 voip sendmail[21973]: q4IGTukR021973: to="AIi Raza" , ctladdr=asterisk (498/496), delay=00:00:00, xdelay=00:00:00, maile r=relay, pri=209772, relay=voip.curemd.com. [172.16.10.20], dsn=2.0.0, stat=Sent (q4IGTu6d021975 Message accepted for delivery)
May 18 21:29:58 voip sendmail[21977]: q4IGTu6d021975: to=, ctladdr= (498/496), delay=00:00:02, xdelay=00:00:02, ma iler=relay, pri=299899, relay=mail.curemd.com. [10.10.1.3], dsn=5.7.1, stat=User unknown
May 18 21:29:58 voip sendmail[21977]: q4IGTu6d021975: forward /var/lib/asterisk/ .forward.voip: Group writable directory
May 18 21:29:58 voip sendmail[21977]: q4IGTu6d021975: forward /var/lib/asterisk/ .forward: Group writable directory
May 18 21:29:58 voip sendmail[21977]: q4IGTu6d021975: q4IGTw6d021977: DSN: User unknown
May 18 21:29:58 voip sendmail[21977]: q4IGTw6d021977: to=, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=211138, dsn=2.0.0, stat=Sent