If you see: “The requested PHP extension imap is missing from your system.”
It seems that you need to install imap extension on your system.
The following simple steps below:
apt-get install php5-imap
However, it’s not enabled IMAP by default so enable it with:
Then bounce apache:
service apache2 restart
If you got “IMAP extension must be enabled.” in PHP.
Continue reading If you catch: php5-imap requires ext-imap * -> the requested PHP extension imap is missing from your system.