Berikut ini adalah tutorial install dovecot 2.4 dari source pada sistem operasi debian 12

sudo apt install build-essential wget autoconf automake libtool pkg-config gettext libssl-dev zlib1g-dev libpam0g-dev

lanjut download dovecot

wget https://dovecot.org/releases/2.4/dovecot-2.4.2.tar.gz
tar -xvf dovecot-2.4.2.tar.gz
cd dovecot-2.4.2

Compile

./configure --prefix=/usr \
            --sysconfdir=/etc \
            --localstatedir=/var \
            --enable-ssl=openssl \
            --with-openssl \
            --enable-imap \
            --enable-pop3 \
            --with-pam

dilanjutkan dengan

make
make install

installasi dovecot 2.4 selesai

Error in configuration file /etc/dovecot/dovecot.conf: default_login_user doesn't exist solusinya

sudo groupadd dovecot
sudo useradd -r -g dovecot -s /sbin/nologin dovecot