Outgoing Email Problem

I have a problem sending mail to hotmail,yahoo,gmail, aol... all public mail servers i guess

i get the following error when trying to deliver mail manually in queue manager

LOG: MAIN
cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -M 1VvyRf-0000h6-Cr
delivering 1VvyRf-0000h6-Cr
Connecting to mailserver.com [w.x.y.z]:25 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
mailserver.com [w.x.y.z] Connection timed out
LOG: MAIN
== user@mailserver.com R=dkim_lookuphost T=dkim_remote_smtp defer (110): Connection timed out

i have reverse ip setup for my host
i have disabled csf, flushed ip tables
still not able to send emails
i would appreciate your help

 

root@linux [~]# telnet mx3.hotmail.com 25
Trying 65.55.37.120...
telnet: connect to address 65.55.37.120: Connection timed out
Trying 65.55.37.72...
telnet: connect to address 65.55.37.72: Connection timed out
^C
root@linux [~]# telnet my-other-box.com 25
Trying a.b.c.d...
Connected to my-other-box.com.
Escape character is '^]'.
220-unix.my-other-box.com ESMTP Exim 4.82 #2 Sun, 29 Dec 2013 13:03:09 +0200
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
^]
telnet>

when i tried hotmail it timed out but when i tried my other server it returned a reply, this means my box has no problem?