SMTP Connection time out

[yudidw2]

Hi all,
Help me please,
my email server having error cannot send email to outside network but send email to internal network is ok, this happen about 3 days ago and until now problem still exist.

My server using zentyal 2.0.23.
Using no smarthost to send mail just direct to internet.

This is the error from mail.log
Jun 20 14:35:19 dove postfix/smtp[25059]: connect to smtpgw.dkintl.com[65.244.80.205]:25: Connection timed out
Jun 20 14:35:19 dove postfix/smtp[25058]: 60B0C14C16A4: to=<Tlam@newbondtextiles.com>, relay=none, delay=4588, delays=4567/0.07/21/0, dsn=4.4.1, status=deferred (connect to newbondtextiles.com[180.149.253.186]:25: Connection timed out)
Jun 20 14:35:19 dove postfix/smtp[25058]: 60B0C14C16A4: to=<kchu@newbondtextiles.com>, relay=none, delay=4588, delays=4567/0.07/21/0, dsn=4.4.1, status=deferred (connect to newbondtextiles.com[180.149.253.186]:25: Connection timed out)
Jun 20 14:35:19 dove postfix/smtp[25071]: connect to mail.global.frontbridge.com[65.55.88.22]:25: Connection timed out
Jun 20 14:35:19 dove postfix/smtp[25058]: 60B0C14C16A4: to=<kpoon@newbondtextiles.com>, relay=none, delay=4588, delays=4567/0.07/21/0, dsn=4.4.1, status=deferred (connect to newbondtextiles.com[180.149.253.186]:25: Connection timed out)
Jun 20 14:35:20 dove postfix/smtp[25051]: 2F7DE14C16EB: to=<chandra@jkt.global-gp.com>, relay=none, delay=1538, delays=1517/0.04/21/0, dsn=4.4.1, status=deferred (connect to mail.jkt.global-gp.com[202.152.57.91]:25: Connection timed out)

Any help would be appreciate.

[veerababu0724]

is your problem is resolved ?
if it is resolved can you help me i have also same problem
my mail id veerababu0724@gmail.com