$ sudo yum install dovecot

/etc/dovecot/dovecot.conf

echo "Установка и конфигурирование Dovecot"
yum -y install dovecot
cp /etc/dovecot/h0uoixdovecot.conf{,.orig}
cat <<'EOF' > /etc/dovecot/dovecot.conf
listen = *
ssl = no
protocols = pop3 imap
disable_plaintext_auth = no
auth_mechanisms = plain login
mail_access_groups = vmail
default_login_user = vmail
first_valid_uid = 2222
first_valid_gid = 2222
#mail_location = maildir:~/Maildir
mail_location = maildir:/var/vmail/%d/%n

passdb {
    driver = passwd-file
    args = scheme=SHA1 /etc/dovecot/passwd
}
userdb {
    driver = static
    args = uid=2222 gid=2222 home=/var/vmail/%d/%n allow_all_users=yes
}
service auth {
    unix_listener auth-client {
        group = postfix
        mode = 0660
        user = postfix
    }
    user = root
}
service imap-login {
  process_min_avail = 1
  user = vmail
}
EOF
rm /etc/dovecot/passwd
touch /etc/dovecot/passwd
rm /tmp/vmp
mailpass=`echo -e $mps`
doveadm pw -p $mailpass -s sha1 | cut -d '}' -f2 > /tmp/vmp