При свързване на мейл клиент Thunderbird и Outlook с мейл сървъра ми показваше следната грешка:

Filesystem notification initialization error — contact your mail administrator (check for configuration errors with the FAM/Gamin library)

Проблема е, че няма libgamin и трябва да се инсталира вместо libfam. Мейл сървъра е postfix

Решението е:

1. Инсталиране на gamin

apt-get update && apt-get -y install gamin

The following extra packages will be installed:
  libgamin0
The following packages will be REMOVED:
  libfam0
The following NEW packages will be installed:
  gamin libgamin0
…
Removing libfam0 …
…
Unpacking gamin (from …/gamin_0.1.10-2+b1_i386.deb) …
Setting up gamin (0.1.10-2+b1) …
Setting up libgamin0 (0.1.10-2+b1) …

2. Рестартиране на courier

find /etc/init.d/ | grep courier | while read line; do $line restart; done

Stopping Courier POP3-SSL server: pop3d-ssl.
Starting Courier POP3-SSL server: pop3d-ssl.
Stopping Courier POP3 server: pop3d.
Starting Courier POP3 server: pop3d.
Stopping Courier authentication services: authdaemond.
Starting Courier authentication services: authdaemond.
Stopping Courier IMAP-SSL server: imapd-ssl.
Starting Courier IMAP-SSL server: imapd-ssl.
Stopping Courier IMAP server: imapd.
Starting Courier IMAP server: imapd.