Cannot connect to SMTP server "host ip" (host ip:25), NB connect error 1460

Hi,

I can connect pop3 with thunderbird and other mail programs. But i can't connect to smtp. Postfix is working and listening 25 port. I couldn't find the problem.

[root@Centos-Host ~]# postfix status
postfix/postfix-script: the Postfix mail system is running: PID: 1269

[root@Centos-Host ~]# netstat -tulpn|grep 25
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 1269/master
tcp 0 0 127.0.0.1:10025 0.0.0.0:* LISTEN 1269/master

When i try to connect smtp, this error returns;

Cannot connect to SMTP server "host ip" (host ip:25), NB connect error 1460.

Here's the server info. Thank you.

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
113   792  113   792    0     0    669      0  0:00:01  0:00:01 --:--:-- 52800
===============================================
Kernel:
Linux Centos-Host 2.6.32-431.1.2.0.1.el6.x86_64 #1 SMP Fri Dec 13 13:06:13 UTC 2                                   013 x86_64 x86_64 x86_64 GNU/Linux

CPU info:
model name      : Intel(R) Xeon(R) CPU E5-2630L v2 @ 2.40GHz

Release:
CentOS release 6.6 (Final)

Arch:
x86_64

Virtualization Type:
kvm

Memory:
             total       used       free     shared    buffers     cached
Mem:           490        453         36          0         19        147
-/+ buffers/cache:        286        204
Swap:         1023         32        991

MySQL info:
mysql  Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.                                   1

Disk Info:
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        20G  4.8G   14G  26% /
tmpfs           246M     0  246M   0% /dev/shm


#
# /etc/fstab
# Created by anaconda on Tue Dec 17 15:22:08 2013
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
LABEL=DOROOT            /                       ext4    usrjquota=quota.user,jqf                                   mt=vfsv0        1 1
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
/swapfile               swap                    swap    defaults        0 0

Apache PHP info
PHP 5.4.27 (cli) (built: Jan 21 2015 05:17:20)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
    with the ionCube PHP Loader v4.7.3, Copyright (c) 2002-2014, by ionCube Ltd.

Apache start script check
httpd=${HTTPD-/usr/local/apache/bin/httpd}

CWP Admin check
/usr/local/cwpsrv/htdocs/admin
===============================================

you need to check dovecot