diff --git a/html/install.iredmail.on.debian.ubuntu.html b/html/install.iredmail.on.debian.ubuntu.html
index 22be730f..0daefd17 100644
--- a/html/install.iredmail.on.debian.ubuntu.html
+++ b/html/install.iredmail.on.debian.ubuntu.html
@@ -37,7 +37,7 @@ which means your server does <strong>NOT</strong> have mail related components i
 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 modifing,
-and it may be not working as expected.</p>
+and it may not be working as expected.</p>
 <p>To install iRedMail on Debian or Ubuntu Linux, you need:</p>
 <ul>
 <li>A <strong>FRESH</strong>, working Debian/Ubuntu Linux. Supported releases are listed on
diff --git a/html/install.iredmail.on.freebsd.html b/html/install.iredmail.on.freebsd.html
index 969e18e2..f911f7f7 100644
--- a/html/install.iredmail.on.freebsd.html
+++ b/html/install.iredmail.on.freebsd.html
@@ -43,7 +43,7 @@ which means your server does <strong>NOT</strong> have mail related components i
 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 modifing,
-and it may be not working as expected.</p>
+and it may not be working as expected.</p>
 <p>To install iRedMail on FreeBSD, you need:</p>
 <ul>
 <li>A <strong>FRESH</strong>, minimal, working FreeBSD system, no additional ports or binary
diff --git a/html/install.iredmail.on.freebsd.with.jail.html b/html/install.iredmail.on.freebsd.with.jail.html
index 72464c9f..4100d5ee 100644
--- a/html/install.iredmail.on.freebsd.with.jail.html
+++ b/html/install.iredmail.on.freebsd.with.jail.html
@@ -52,7 +52,7 @@ which means your server does <strong>NOT</strong> have mail related components i
 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 modifing,
-and it may be not working as expected.</p>
+and it may not be working as expected.</p>
 <ul>
 <li>The latest stable release of iRedMail. You can download it here: http://www.iredmail.org/download.html</li>
 <li>Port <code>sysutils/ezjail</code> for FreeBSD.</li>
diff --git a/html/install.iredmail.on.openbsd.html b/html/install.iredmail.on.openbsd.html
index 4a03bdcf..8bb2a6b7 100644
--- a/html/install.iredmail.on.openbsd.html
+++ b/html/install.iredmail.on.openbsd.html
@@ -37,7 +37,7 @@ which means your server does <strong>NOT</strong> have mail related components i
 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 modifing,
-and it may be not working as expected.</p>
+and it may not be working as expected.</p>
 <p>To install iRedMail on OpenBSD, you need:</p>
 <ul>
 <li>A <strong>FRESH</strong>, working OpenBSD system. Supported releases are listed on
diff --git a/html/install.iredmail.on.rhel.html b/html/install.iredmail.on.rhel.html
index dbf923bc..8354fcdc 100644
--- a/html/install.iredmail.on.rhel.html
+++ b/html/install.iredmail.on.rhel.html
@@ -37,7 +37,7 @@ which means your server does <strong>NOT</strong> have mail related components i
 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 modifing,
-and it may be not working as expected.</p>
+and it may not be working as expected.</p>
 <p>To install iRedMail on RHEL or CentOS Linux, you need:</p>
 <ul>
 <li>A <strong>FRESH</strong>, working RHEL or CentOS system. Supported releases are listed on
diff --git a/installation/1-install.iredmail.on.rhel.md b/installation/1-install.iredmail.on.rhel.md
index 94ada9db..2a05f8f4 100644
--- a/installation/1-install.iredmail.on.rhel.md
+++ b/installation/1-install.iredmail.on.rhel.md
@@ -9,7 +9,7 @@ which 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 modifing,
-and it may be not working as expected.
+and it may not be working as expected.
 
 To install iRedMail on RHEL or CentOS Linux, you need:
 
diff --git a/installation/2-install.iredmail.on.debian.ubuntu.md b/installation/2-install.iredmail.on.debian.ubuntu.md
index e4d66ac6..453afa72 100644
--- a/installation/2-install.iredmail.on.debian.ubuntu.md
+++ b/installation/2-install.iredmail.on.debian.ubuntu.md
@@ -9,7 +9,7 @@ which 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 modifing,
-and it may be not working as expected.
+and it may not be working as expected.
 
 To install iRedMail on Debian or Ubuntu Linux, you need:
 
diff --git a/installation/3-install.iredmail.on.freebsd.md b/installation/3-install.iredmail.on.freebsd.md
index b594b220..e3c2f460 100644
--- a/installation/3-install.iredmail.on.freebsd.md
+++ b/installation/3-install.iredmail.on.freebsd.md
@@ -13,7 +13,7 @@ which 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 modifing,
-and it may be not working as expected.
+and it may not be working as expected.
 
 To install iRedMail on FreeBSD, you need:
 
diff --git a/installation/4-install.iredmail.on.freebsd.with.jail.md b/installation/4-install.iredmail.on.freebsd.with.jail.md
index e7c91233..b2bd1fa2 100644
--- a/installation/4-install.iredmail.on.freebsd.with.jail.md
+++ b/installation/4-install.iredmail.on.freebsd.with.jail.md
@@ -22,7 +22,7 @@ which 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 modifing,
-and it may be not working as expected.
+and it may not be working as expected.
 
 * The latest stable release of iRedMail. You can download it here: http://www.iredmail.org/download.html
 * Port `sysutils/ezjail` for FreeBSD.
diff --git a/installation/5-install.iredmail.on.openbsd.md b/installation/5-install.iredmail.on.openbsd.md
index 3dbb051d..7e1a05f7 100644
--- a/installation/5-install.iredmail.on.openbsd.md
+++ b/installation/5-install.iredmail.on.openbsd.md
@@ -9,7 +9,7 @@ which 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 modifing,
-and it may be not working as expected.
+and it may not be working as expected.
 
 To install iRedMail on OpenBSD, you need: