When I migrated SuiteCRM from Windows Server to Ubuntu, I scheduled cron job but the output showed the following error.
Inbound Email cannot function without the IMAP c-client libraries enabled/compiled with the PHP module.
When I tried to search online, I did not get a quick answer. After understanding some technical details of the error, I figured out that there is an IMAP php module is missing.
Once you install IMAP php module and restart Apache (don’t forget to restart), SuiteCRM cron job will work.