diff --git a/en_US/installation/0-install.iredmail.on.debian.ubuntu.md b/en_US/installation/0-install.iredmail.on.debian.ubuntu.md
index 41d48ea0..8219a38a 100644
--- a/en_US/installation/0-install.iredmail.on.debian.ubuntu.md
+++ b/en_US/installation/0-install.iredmail.on.debian.ubuntu.md
@@ -18,7 +18,7 @@
       means your server does __NOT__ have mail related components installed,
       e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
       and configure them for you automatically. Otherwise it may override your
-      existing files/configurations althought it will backup files before
+      existing files/configurations although it will backup files before
       modifying, and it may not be working as expected.
     * Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
       server with AWS, you need to [remove the throttle on port
diff --git a/en_US/installation/0-install.iredmail.on.freebsd.md b/en_US/installation/0-install.iredmail.on.freebsd.md
index 59bddbda..a840f885 100644
--- a/en_US/installation/0-install.iredmail.on.freebsd.md
+++ b/en_US/installation/0-install.iredmail.on.freebsd.md
@@ -14,7 +14,7 @@
       means your server does __NOT__ have mail related components installed,
       e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
       and configure them for you automatically. Otherwise it may override your
-      existing files/configurations althought it will backup files before
+      existing files/configurations although it will backup files before
       modifying, and it may not be working as expected.
     * Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
       server with AWS, you need to [remove the throttle on port
diff --git a/en_US/installation/0-install.iredmail.on.freebsd.with.jail.md b/en_US/installation/0-install.iredmail.on.freebsd.with.jail.md
index 86c18b97..ee71dc46 100644
--- a/en_US/installation/0-install.iredmail.on.freebsd.with.jail.md
+++ b/en_US/installation/0-install.iredmail.on.freebsd.with.jail.md
@@ -25,7 +25,7 @@ Notes:
       means your server does __NOT__ have mail related components installed,
       e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
       and configure them for you automatically. Otherwise it may override your
-      existing files/configurations althought it will backup files before
+      existing files/configurations although it will backup files before
       modifying, and it may not be working as expected.
     * Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
       server with AWS, you need to [remove the throttle on port
diff --git a/en_US/installation/0-install.iredmail.on.openbsd.md b/en_US/installation/0-install.iredmail.on.openbsd.md
index d7b0d256..60aac930 100644
--- a/en_US/installation/0-install.iredmail.on.openbsd.md
+++ b/en_US/installation/0-install.iredmail.on.openbsd.md
@@ -18,7 +18,7 @@
       means your server does __NOT__ have mail related components installed,
       e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
       and configure them for you automatically. Otherwise it may override your
-      existing files/configurations althought it will backup files before
+      existing files/configurations although it will backup files before
       modifying, and it may not be working as expected.
     * Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
       server with AWS, you need to [remove the throttle on port
diff --git a/en_US/installation/0-install.iredmail.on.rhel.md b/en_US/installation/0-install.iredmail.on.rhel.md
index d6b6f8ae..2c7c89c0 100644
--- a/en_US/installation/0-install.iredmail.on.rhel.md
+++ b/en_US/installation/0-install.iredmail.on.rhel.md
@@ -18,7 +18,7 @@
       means your server does __NOT__ have mail related components installed,
       e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
       and configure them for you automatically. Otherwise it may override your
-      existing files/configurations althought it will backup files before
+      existing files/configurations although it will backup files before
       modifying, and it may not be working as expected.
     * Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
       server with AWS, you need to [remove the throttle on port
diff --git a/html/install.iredmail.on.debian.ubuntu.html b/html/install.iredmail.on.debian.ubuntu.html
index 8fb80d94..db5b1832 100644
--- a/html/install.iredmail.on.debian.ubuntu.html
+++ b/html/install.iredmail.on.debian.ubuntu.html
@@ -54,7 +54,7 @@ is available through the ticket system.</p>
   means your server does <strong>NOT</strong> have mail related components installed,
   e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
   and configure them for you automatically. Otherwise it may override your
-  existing files/configurations althought it will backup files before
+  existing files/configurations although it will backup files before
   modifying, and it may not be working as expected.</li>
 <li>Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
   server with AWS, you need to <a href="https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/">remove the throttle on port
diff --git a/html/install.iredmail.on.freebsd.html b/html/install.iredmail.on.freebsd.html
index 0a409805..c5dc5295 100644
--- a/html/install.iredmail.on.freebsd.html
+++ b/html/install.iredmail.on.freebsd.html
@@ -49,7 +49,7 @@ this installation guide instead:
   means your server does <strong>NOT</strong> have mail related components installed,
   e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
   and configure them for you automatically. Otherwise it may override your
-  existing files/configurations althought it will backup files before
+  existing files/configurations although it will backup files before
   modifying, and it may not be working as expected.</li>
 <li>Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
   server with AWS, you need to <a href="https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/">remove the throttle on port
diff --git a/html/install.iredmail.on.freebsd.with.jail.html b/html/install.iredmail.on.freebsd.with.jail.html
index a678e48e..f7170761 100644
--- a/html/install.iredmail.on.freebsd.with.jail.html
+++ b/html/install.iredmail.on.freebsd.with.jail.html
@@ -64,7 +64,7 @@
   means your server does <strong>NOT</strong> have mail related components installed,
   e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
   and configure them for you automatically. Otherwise it may override your
-  existing files/configurations althought it will backup files before
+  existing files/configurations although it will backup files before
   modifying, and it may not be working as expected.</li>
 <li>Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
   server with AWS, you need to <a href="https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/">remove the throttle on port
diff --git a/html/install.iredmail.on.openbsd.html b/html/install.iredmail.on.openbsd.html
index 777132de..6a31c151 100644
--- a/html/install.iredmail.on.openbsd.html
+++ b/html/install.iredmail.on.openbsd.html
@@ -51,7 +51,7 @@ is available through the ticket system.</p>
   means your server does <strong>NOT</strong> have mail related components installed,
   e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
   and configure them for you automatically. Otherwise it may override your
-  existing files/configurations althought it will backup files before
+  existing files/configurations although it will backup files before
   modifying, and it may not be working as expected.</li>
 <li>Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
   server with AWS, you need to <a href="https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/">remove the throttle on port
diff --git a/html/install.iredmail.on.rhel.html b/html/install.iredmail.on.rhel.html
index d133926a..06ea3e45 100644
--- a/html/install.iredmail.on.rhel.html
+++ b/html/install.iredmail.on.rhel.html
@@ -55,7 +55,7 @@ is available through the ticket system.</p>
   means your server does <strong>NOT</strong> have mail related components installed,
   e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
   and configure them for you automatically. Otherwise it may override your
-  existing files/configurations althought it will backup files before
+  existing files/configurations although it will backup files before
   modifying, and it may not be working as expected.</li>
 <li>Amazon AWS EC2 blocks port 25 by default, if you plan to deploy mail
   server with AWS, you need to <a href="https://aws.amazon.com/premiumsupport/knowledge-center/ec2-port-25-throttle/">remove the throttle on port