diff --git a/en_US/upgrade/0-upgrade.iredmail.0.9.2-0.9.3.md b/en_US/upgrade/0-upgrade.iredmail.0.9.2-0.9.3.md
index 0e50135c..a35d4071 100644
--- a/en_US/upgrade/0-upgrade.iredmail.0.9.2-0.9.3.md
+++ b/en_US/upgrade/0-upgrade.iredmail.0.9.2-0.9.3.md
@@ -391,7 +391,7 @@ sql> INSERT INTO alias (address, goto, is_alias, alias_to, domain)
 > 
 > * Values of column `alias.goto` and `alias.alias_to` are the same.
 > * You can add as many additional email addresses as you want.
-> * In above sample, `extra@domain.com` can be email address belong to your alias domain.
+> * In above sample, `extra@domain.com` can be an email address belong to your alias domain.
 
 ### Add new SQL table `outbound_wblist` in `amavisd` database
 
@@ -451,7 +451,7 @@ sql> INSERT INTO alias (address, goto, is_alias, alias_to, domain)
 > 
 > * Values of column `alias.goto` and `alias.alias_to` are the same.
 > * You can add as many additional email addresses as you want.
-> * In above sample, `extra@domain.com` can be email address belong to your alias domain.
+> * In above sample, `extra@domain.com` can be an email address belong to your alias domain.
 
 ### Add new SQL table `outbound_wblist` in `amavisd` database
 
diff --git a/html/upgrade.iredmail.0.9.2-0.9.3.html b/html/upgrade.iredmail.0.9.2-0.9.3.html
index 030b4ce7..56ceca21 100644
--- a/html/upgrade.iredmail.0.9.2-0.9.3.html
+++ b/html/upgrade.iredmail.0.9.2-0.9.3.html
@@ -392,7 +392,7 @@ sql> INSERT INTO alias (address, goto, is_alias, alias_to, domain)
 <ul>
 <li>Values of column <code>alias.goto</code> and <code>alias.alias_to</code> are the same.</li>
 <li>You can add as many additional email addresses as you want.</li>
-<li>In above sample, <code>extra@domain.com</code> can be email address belong to your alias domain.</li>
+<li>In above sample, <code>extra@domain.com</code> can be an email address belong to your alias domain.</li>
 </ul>
 </blockquote>
 <h3 id="add-new-sql-table-outbound_wblist-in-amavisd-database_1">Add new SQL table <code>outbound_wblist</code> in <code>amavisd</code> database</h3>
@@ -444,7 +444,7 @@ sql&gt; INSERT INTO alias (address, goto, is_alias, alias_to, domain)
 <ul>
 <li>Values of column <code>alias.goto</code> and <code>alias.alias_to</code> are the same.</li>
 <li>You can add as many additional email addresses as you want.</li>
-<li>In above sample, <code>extra@domain.com</code> can be email address belong to your alias domain.</li>
+<li>In above sample, <code>extra@domain.com</code> can be an email address belong to your alias domain.</li>
 </ul>
 </blockquote>
 <h3 id="add-new-sql-table-outbound_wblist-in-amavisd-database_2">Add new SQL table <code>outbound_wblist</code> in <code>amavisd</code> database</h3>