Author: anup

Get the mailids of all email currently in queue: postqueue -p|egrep “[A-F0-9]{11}”|awk ‘{print $1}’ Get the count of emails in queue: mailq | tail -n 1 or postqueue -p|egrep “[A-F0-9]{11}”|awk…

Note: Before you try to request removal, be sure to analyze your server to find out why you were listed in the first place. You have to fix the issue…

yum (RHEL/CentOs/SL/etc) has an option which allows you to limit the download rate/amount of bandwidth used to download packages. Here’s how you do it: Edit the /etc/yum.conf file and add the following line:…

When you see the following prompt with a blinking cursor instead of your RHEL 5 (Or CentOS/Scientific Linux v5 obviously) server booting, you will have in all likelihood have to…

How to execute command via SSH on remote machine and get output on local machine console. ## SYNTAX ssh [user]@[remote host] [command]   ## EXAMPLE ssh [email protected] df -h  …

To install VMWare tools using YUM on CentOS/RHEL 6.5, do the following. Note, I’m logged in as the ‘root’ user, but you could execute these commands using ‘sudo’ as well.…

Note: Before you try to request removal, be sure to analyze your server to find out why you were listed in the first place. You have to fix the issue…

Back up your email Select File > Open & Export > Import/Export. Select Export to a file, and then select Next. Select Outlook Data File (.pst), and select Next. Select…

Change the hostname for Windows Server 2008: 1.1. Right-click the My Computer icon and choose Properties .1.2. Select the Computer Name tab and click on the Change button.1.3. Restart the…

If you are blacklisted, your email will be rejected with a 421 or 550 SMTP error. You can spot this in your email server’s logs: Example of a 550 Error:…