php-imap is no longer present in Red Hat

[falon]

php-imap is no longer distributed in Red Hat EL8. The Learn and Classifier modules use php-imap. I should rewrite the code with Horde IMAP Client.

Workaround

A php-imap 7.4.6 rpm for EL8 has been added to the shared repo. But you must do some tricks to install it in a modular environment.