Fetching Email via IMAP or POP

POP3 connection broken in response

same result for SMTP check

system:
Operating system : Centos 7
php version: 5.4
mysql version: 14.14
how to solve this issue
someone can you help me?

    rajibkhansumon
    To install and run osTicket the following components are required;

    Web Server: Apache or IIS
PHP Version: 5.6+
MySQL Database: 5.0+

      You have not supplied the webserver (and version) that you are using.
      Your PHP version is indeed too low and you should upgrade.
      Also since you are running CentOS are you also running SELinux?

      Web Server Apache
      php version : 5.4
      SELinux is disabled

      after php version upgrade php 5.4 to 5.6 showing bellow error. how can i do this in this situation

      IMAP doesn't exist. PHP must be compiled with IMAP enabled.

        ntozier php upgrade done to 5.6 but still getting bellow error

        POP3 connection broken in response

          php upgrade done to 5.6 but still getting bellow error

          POP3 connection broken in response

          ntozier php upgrade and imap installation done but still getting bellow error

          POP3 connection broken in response

              You install PHP-imap usually by doing something like:

              apt-get install php-imap

              Doing so should install imap and make it available to PHP. It sounds like you have installed IMAP not the PHP IMAP package needed.