diff --git a/en_US/faq/file.locations.md b/en_US/faq/file.locations.md
index dd441871..e69077d6 100644
--- a/en_US/faq/file.locations.md
+++ b/en_US/faq/file.locations.md
@@ -81,7 +81,7 @@ Main config files are `nginx.conf` and `default.conf`.
 
 Main config file is `dovecot.conf`. It contains most configurations.
 
-Additional config files:
+Additional config files under `/etc/dovecot/`:
 
 * `dovecot-ldap.conf`: used to query mail users and passwords. LDAP backends only.
 * `dovecot-mysql.conf`: used to query mail users and passwords. MySQL/MariaDB backends only.
@@ -92,10 +92,14 @@ Additional config files:
 
 ### Log files
 
-* `/var/log/dovecot.log`: main log file.
-* `/var/log/dovecot-sieve.log`: sieve related log. NOTE: on old iRedMail
+* `/var/log/dovecot.log`: main log file. IMAP/POP3 sessions, login, lotout,
+  some error messages will be logged in this file.
+* `/var/log/dovecot-sieve.log`: sieve LDA (Local Delivery Agent) related log.
+  Mail delivery related log will be logged in this file. NOTE: on old iRedMail
   releases, it's `/var/log/sieve.log`.
-* `/var/log/dovecot-lmtp.log`: LMTP related log.
+* `/var/log/dovecot-lmtp.log`: LMTP related log. Mail delivery (via LMTP)
+  related log will be logged in this file. Note: there's no such file on
+  iRedMail-0.8.6 and old iRedMail releases.
 
 ## OpenLDAP
 
diff --git a/html/file.locations.html b/html/file.locations.html
index e6f8a8fb..e713acba 100644
--- a/html/file.locations.html
+++ b/html/file.locations.html
@@ -129,7 +129,7 @@
 </ul>
 <h3 id="config-files">Config files</h3>
 <p>Main config file is <code>dovecot.conf</code>. It contains most configurations.</p>
-<p>Additional config files:</p>
+<p>Additional config files under <code>/etc/dovecot/</code>:</p>
 <ul>
 <li><code>dovecot-ldap.conf</code>: used to query mail users and passwords. LDAP backends only.</li>
 <li><code>dovecot-mysql.conf</code>: used to query mail users and passwords. MySQL/MariaDB backends only.</li>
@@ -140,10 +140,14 @@
 </ul>
 <h3 id="log-files_1">Log files</h3>
 <ul>
-<li><code>/var/log/dovecot.log</code>: main log file.</li>
-<li><code>/var/log/dovecot-sieve.log</code>: sieve related log. NOTE: on old iRedMail
+<li><code>/var/log/dovecot.log</code>: main log file. IMAP/POP3 sessions, login, lotout,
+  some error messages will be logged in this file.</li>
+<li><code>/var/log/dovecot-sieve.log</code>: sieve LDA (Local Delivery Agent) related log.
+  Mail delivery related log will be logged in this file. NOTE: on old iRedMail
   releases, it's <code>/var/log/sieve.log</code>.</li>
-<li><code>/var/log/dovecot-lmtp.log</code>: LMTP related log.</li>
+<li><code>/var/log/dovecot-lmtp.log</code>: LMTP related log. Mail delivery (via LMTP)
+  related log will be logged in this file. Note: there's no such file on
+  iRedMail-0.8.6 and old iRedMail releases.</li>
 </ul>
 <h2 id="openldap">OpenLDAP</h2>
 <p>Main config file:</p>