Thanks For the Replay.
I have updated the Osticket to v1.18.1. But I am facing an issue of the Mailer Error.
Error : Unable to email via Sendmail Unable to send mail: mail(): Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set()
When I tried to configure authenticate in the Mailbox setting of Admin Panel. it will give the below error.
cannot connect to host; error = stream_socket_client(): Unable to connect to ssl://imap.gmail.com:993 (Unable to find the socket transport "ssl" - did you forget to enable it when you configured PHP?) (errno = 0 )
Can you please help me with that?
Thanks