[Plugin: WP SimpleMail] Fatal error

Fatal Error I DO wish this would work. Installed as per instructions, upgraded email to IMAP and the plugin crashed:

here’s the error:
Fatal error: Call to undefined function imap_timeout() in /home/content/p/i/e/piet305/html/wp-content/plugins/wp-simplemail/wpSimpleMailCommon.php on line 43

i would like this to work. I do. I do

https://www.ads-software.com/extend/plugins/wp-simplemail/