1. SSH into your server (Vagrant, Whatever)
vagrant ssh # or ssh whatever@whereever
2. Follow the following instruction:
cd /tmp apt-get install php7.0-dev pecl download mailparse tar xvzf mailparse-3.0.2.tgz cd mailparse-3.0.2 phpize ./configure sed -i \ 's/^\(#error .* the mbstring extension!\)/\/\/\1/' \ mailparse.c make make install
echo "extension=mailparse.so" > \ /etc/php/7.0/fpm/conf.d/30-mailparse.ini service php7.0-fpm reload
echo "extension=mailparse.so" > \ /etc/php/7.0/mods-available/mailparse.ini ln -s /etc/php/7.0/mods-available/mailparse.ini /etc/php/7.0/cli/conf.d/30-mailparse.ini ln -s /etc/php/7.0/mods-available/mailparse.ini /etc/php/7.0/cli/conf.d/30-mailparse.ini
Source: https://stackoverflow.com/questions/35793216/installing-mailparse-php7-mbstring-error
Although I ended up adding manually (last step) maybe this can be a future reference for myself or any other developer.