improved formatting

Just some small Markdown syntax corrections.

INSTALL.md

@@ -14,7 +14,7 @@ These instructions are based on an installation on an Ubuntu 14.04 LTS virtual m
 
 ## Install GPG-Mailgate
 ### Requirements
-- Python 3.X is already installed
+- Python 3.x is already installed
 - Postfix is already installed and configured. It is recommended that you have already tested your configuration so we can exclude this as a main cause of problems
 - GnuPG is already installed and configured
 
@@ -22,22 +22,30 @@ These instructions are based on an installation on an Ubuntu 14.04 LTS virtual m
 
 1. Install the Python-M2Crypto module:
 
+```
 apt-get install python-m2crypto
+```
 
 2. Set the home directory for the user `nobody` (sadly this workaround is needed as there is no better solution at this point). If you get an error that the user is currently used by a process, you might need to kill the process manually.
 
+```
 usermod -d /var/gpgmailgate nobody
+```
 
 3. Create dedicated directories for storing PGP keys and S/MIME certificates and make the user `nobody` owner of these:
 
+```
 mkdir -p /var/gpgmailgate/.gnupg
 mkdir -p /var/gpgmailgate/smime
 chown -R nobody:nogroup /var/gpgmailgate/
+```
 
 4. Place the `gpg-mailgate.py` in `/usr/local/bin/`, make the user `nobody` owner of the file and make it executable:
 
+```
 chown nobody:nogroup /usr/local/bin/gpg-mailgate.py
 chmod u+x /usr/local/bin/gpg-mailgate.py
+```
 
 5. Place the `GnuPG` directory in `/usr/local/lib/python3.x/dist-packages` (replace 3.x with your Python version)
 
@@ -47,6 +55,7 @@ These instructions are based on an installation on an Ubuntu 14.04 LTS virtual m
 
 8. Add the following to the end of `/etc/postfix/master.cf`
 
+```
 gpg-mailgate    unix    -   n   n   -   -   pipe
     flags= user=nobody argv=/usr/local/bin/gpg-mailgate.py ${recipient}
 
@@ -59,22 +68,29 @@ These instructions are based on an installation on an Ubuntu 14.04 LTS virtual m
     -o smtpd_recipient_restrictions=permit_mynetworks,reject
     -o mynetworks=127. 0. 0. 0/8
     -o smtpd_authorized_xforward_hosts=127. 0. 0. 0/8
+```
 
 If you use Postfix versions from 2.5 onwards, it is recommended to change `${recipient}` to `${original_recipient}` in line two of the lines above.
 
 9. Add the following line to `/etc/postfix/main.cf`
 
+```
 content_filter = gpg-mailgate
+```
 
 10. Optional: GPG can automatically download new public keys for automatic signature verification. To enable automatic create the file `/var/gpgmailgate/.gnupg/gpg.conf`. Add the following line to the file:
 
+```
 keyserver-options auto-key-retrieve
+```
 
 11. Restart Postfix
 
 You are now ready to go. To add a public key for encryption just use the following command:
 
+```
 sudo -u nobody /usr/bin/gpg --homedir=/var/gpgmailgate/.gnupg --import /some/public.key
+```
 
 - Replace `/some/public.key` with the location of a public key
 - `/some/public.key` can be deleted after importation
@@ -114,14 +130,16 @@ You also can remove a private key by using the following command. Replace `user@
 - A webserver is installed and reachable
 - The webserver is able to handle PHP scripts
 - MySQL is installed
-- Python 3.X is already installed
+- Python 3.x is already installed
 
 ### Installation
 All files you need can be found in the [gpg-mailgate-web](gpg-mailgate-web/) directory.
 
 1. Install the Python-mysqldb and Python-markdown modules:
 
+```
 apt-get install python-mysqldb python-markdown
+```
 
 2. Create a new database for GPG-Mailgate-Web.
 
@@ -135,16 +153,22 @@ All files you need can be found in the [gpg-mailgate-web](gpg-mailgate-web/) dir
 
 7. Create directories for storing email templates:
 
+```
 mkdir -p /var/gpgmailgate/cron_templates
+```
 
 8. Copy the templates found in the [cron_templates](cron_templates/) directory into the newly created directory and transfer ownership:
 
+```
 chown -R nobody:nogroup /var/gpgmailgate/cron_templates
+```
 
 9. Copy `cron.py` to `/usr/local/bin/gpgmw-cron.py`. Make it executable and and transfer ownership to `nobody`:
 
+```
 chown nobody:nogroup /usr/local/bin/gpgmw-cron.py
 chmod u+x /usr/local/bin/gpgmw-cron.py
+```
 
 10. Create `/etc/cron.d/gpgmw` with contents:
 `*/3 * * * * nobody /usr/bin/python /usr/local/bin/gpgmw-cron.py > /dev/null`
@@ -164,20 +188,28 @@ GPG-Mailgate-Web can also be used as a keyserver. For more information have a lo
 
 1. Install the Python-requests module:
 
+```
 apt-get install python-requests
+```
 
 2. Create directories for storing email templates:
 
+```
 mkdir -p /var/gpgmailgate/register_templates
+```
 
 3. Copy the templates found in the [register_templates](register_templates/) directory into the newly created directory and transfer ownership:
 
+```
 chown -R nobody:nogroup /var/gpgmailgate/register_templates
+```
 
 4. Copy `register-handler.py` to `/usr/local/bin/register-handler.py`. Make it executable and own it to `nobody`:
 
+```
 chown nobody:nogroup /usr/local/bin/register-handler.py
 chmod a+x /usr/local/bin/register-handler.py
+```
 
 5. Edit the config file located at `/etc/gpg-mailgate.conf`. Set the parameter `webpanel_url` in `[mailregister]` to the url of your GPG-Mailgate-Web panel (the URL should be the same as the one you use to access the panel with your web browser). Also set the parameter `register_email` to the email address you want the user to see when receiving mails from the register-handler (it does not have to be an existing address but it is recommended). Register-handler will send users mails when they are registering S/MIME certificates or when neither a S/MIME certificate nor a PGP key was found in a mail sent to the register-handler.