I have issues with integrating with the SMTP within our network. We use Exchange 2013. I am getting the below kind of errors in the SMTP.
PHP Fatal error: Class 'Swift_MailTransport' not found in /home/public_html/includes/helper-functions.php on line 1217
PHP Warning: Cannot modify header information - headers already sent by (output started at /home/public_html/includes/helper-functions.php:931) in /home/reg/public_html/uf/view.php on line 121
Whenever i am enabling TLS i am getting the below error as well.
Uncaught exception 'Swift_TransportException' with message 'Unable to connect with TLS encryption' in /home/public_html/lib/swift-mailer/classes/Swift/Transport/EsmtpTransport.php:294
Please help me on this.