I\'m having problems trying to get imap working with my docker-compose.
Here is what my php dockerfile looks like.
FROM php:7.2-fpm RUN apt-get upda
Solved it by using
RUN apt update && apt install -y libc-client-dev libkrb5-dev && rm -r /var/lib/apt/ RUN docker-php-ext-configure imap --with-kerberos --with-imap-ssl && docker-php-ext-install imap
Found at https://stackoverflow.com/a/52314180/2311074