cron to email_fetch error

[thaymaker]

My cron job to email_fetch won't run. Get the following error:

PHP Warning: Use of undefined constant CL_EXPUNGE - assumed 'CL_EXPUNGE' (this will throw an Error in a future version of PHP) in /var/www/html/ruko/plugins/ext/classes/mail/mail_fetcher.php on line 37
PHP Fatal error: Uncaught Error: Call to undefined function imap_open() in /var/www/html/ruko/plugins/ext/classes/mail/mail_fetcher.php:38
Stack trace:
#0 /var/www/html/ruko/cron/email_fetch.php(37): mail_fetcher->fetch()
#1 {main}
thrown in /var/www/html/ruko/plugins/ext/classes/mail/mail_fetcher.php on line 38

Check connection only works using :143/notls as I am on a domain behind ddns.net

[thaymaker]

This has been resolved.