Can't Start Apache

[Ron-e]

it looks like you did not close the virtualhost from this:

Code:

<virtualhost *:80>
ServerName techsen.co.za
ServerAlias  http://www.techsen.co.za
ServerAdmin zadmin@localhost
DocumentRoot "/var/sentora/hostdata/zadmin/public_html/techsen_co_za"
php_admin_value open_basedir "/var/sentora/hostdata/zadmin/public_html/techsen_co_za:/var/sentora/temp/"
php_admin_value suhosin.executor.func.blacklist "passthru, show_source, shell_exec, system, pcntl_exec, popen, pclose, proc_open, proc_nice, proc_terminate, proc_get_status, proc_close, leak, apache_child_terminate, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid, posix_setuid, escapeshellcmd, escapeshellarg, exec"
ErrorLog "/var/sentora/logs/domains/zadmin/techsen.co.za-error.log"
CustomLog "/var/sentora/logs/domains/zadmin/techsen.co.za-access.log" combined
CustomLog "/var/sentora/logs/domains/zadmin/techsen.co.za-bandwidth.log" common
<Directory "/var/sentora/hostdata/zadmin/public_html/techsen_co_za">
 Options +FollowSymLinks -Indexes
 AllowOverride All
 Require all granted
</Directory>
AddType application/x-httpd-php .php3 .php
ErrorDocument 403 /_errorpages/403.html
ErrorDocument 404 /_errorpages/404.html
ErrorDocument 500 /_errorpages/500.html
ErrorDocument 510 /_errorpages/510.html
DirectoryIndex index.html index.htm index.php index.asp index.aspx index.jsp index.jspa index.shtml index.shtm
# Custom Global Settings (if any exist)
Alias /webmail /etc/sentora/panel/etc/apps/webmail
# Custom VH settings (if any exist)
# Configuration for WebMail

The webmail.techsen.co.za part looks like a custom vhost.
You need to start your custom vhost with </VirtualHost> like in this post/thread.