some SSL problem in Mail submission.

I am getting this error in my mail.log
Please have a look and see how I can fix it.

Code:

Jan  2 04:12:26 server2 postfix/submission/smtpd[12685]: SSL_accept error from server2.mywebsolutions.co.in[69.197.135.186]: 0
Jan  2 04:12:26 server2 postfix/submission/smtpd[12685]: warning: TLS library problem: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca:s3_pkt.c:1487:SSL alert number 48:
Jan  2 04:12:26 server2 postfix/submission/smtpd[12685]: lost connection after STARTTLS from server2.mywebsolutions.co.in[69.197.135.186]

Thanks.

 

Hi Till,
I have updated the SSL certificate to let's encrypt as per the link.
I am able to test the connection from an Magento extension Aschroder SMTP, it works fine.
but when working with a CRON mail I am facing this issue:
Cron Magento error:

Code:

Zend_Mail_Protocol_Exception: Unable to connect via TLS in /var/www/clients/client2/web200/web/lib/Zend/Mail/Protocol/Smtp.php:213
Stack trace:
#0 /var/www/clients/client2/web200/web/lib/Zend/Mail/Transport/Smtp.php(200): Zend_Mail_Protocol_Smtp->helo('localhost')
#1 /var/www/clients/client2/web200/web/lib/Zend/Mail/Transport/Abstract.php(348): Zend_Mail_Transport_Smtp->_sendMail()
#2 /var/www/clients/client2/web200/web/lib/Zend/Mail.php(1194): Zend_Mail_Transport_Abstract->send(Object(Zend_Mail))
#3 /var/www/clients/client2/web200/web/app/code/local/Aschroder/SMTPPro/Model/Email.php(48): Zend_Mail->send(Object(Zend_Mail_Transport_Smtp))
#4 /var/www/clients/client2/web200/web/app/code/community/Meanbee/VIPMembership/Model/Observer.php(249): Aschroder_SMTPPro_Model_Email->send()
#5 /var/www/clients/client2/web200/web/app/code/core/Mage/Cron/Model/Observer.php(325): Meanbee_VIPMembership_Model_Observer->sendExpiryNotification(Object(Mage_Cron_Model_Schedule))
#6 /var/www/clients/client2/web200/web/app/code/core/Mage/Cron/Model/Observer.php(72): Mage_Cron_Model_Observer->_processJob(Object(Mage_Cron_Model_Schedule), Object(Mage_Core_Model_Config_Element))
#7 /var/www/clients/client2/web200/web/app/code/core/Mage/Core/Model/App.php(1338): Mage_Cron_Model_Observer->dispatch(Object(Varien_Event_Observer))
#8 /var/www/clients/client2/web200/web/app/code/core/Mage/Core/Model/App.php(1317): Mage_Core_Model_App->_callObserverMethod(Object(Mage_Cron_Model_Observer), 'dispatch', Object(Varien_Event_Observer))
#9 /var/www/clients/client2/web200/web/app/Mage.php(448): Mage_Core_Model_App->dispatchEvent('default', Array)
#10 /var/www/clients/client2/web200/web/cron.php(76): Mage::dispatchEvent('default')
#11 {main}

and in smtp.php line 213 reads like this:

Code:

  // If a TLS session is required, commence negotiation
        if ($this->_secure == 'tls') {
            $this->_send('STARTTLS');
            $this->_expect(220, 180);
            if (!stream_socket_enable_crypto($this->_socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {

                /**
                 * @see Zend_Mail_Protocol_Exception
                 */
                #require_once 'Zend/Mail/Protocol/Exception.php';
                throw new Zend_Mail_Protocol_Exception('Unable to connect via TLS');
           }
            $this->_ehlo($host);
        }

        $this->_startSession();
        $this->auth();
    }

and in /var/log/mail.log

Code:

Jan  3 16:20:08 server2 postfix/submission/smtpd[23306]: lost connection after STARTTLS from server2.mywebsolutions.co.in[69.197.135.186]
Jan  3 16:20:08 server2 postfix/submission/smtpd[23306]: disconnect from server2.mywebsolutions.co.in[69.197.135.186] ehlo=1 starttls=1 commands=2

Can you help me resolve this?
Thanks.

 

Yes I thought and tried that. but it appears that somewhere I have blocked port 25 for submission. can you give me a hint where I can re-enable it quickly else I have to spend lot of time fixing that.

 

Hi
Thanks Till.
Yes with port 25, it's working absolutely fine.