Magento SMTP – “could not open socket”

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SMTP message – “could not open socket” error

This is due to the Zend framework used in Magento 1

There are two possible reasons for this problem

1. OpenSSL is not installed

Use the phpinfo module to see if OpenSSL is installed

2. Firewall problem( Close the firewall)

View firewall status:

[ root@centos6 ~]# service iptables status

Iptables: firewall is not running

Open firewall:

[ root@centos6 ~]# service iptables start

Turn off firewall:

[ root@centos6 ~]# service iptables stop

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