How to Prevent Outgoing Spam on Your Server

Often when we think of spam, it usually relates to incoming spam inundating mail servers and bogging down systems. Another way spam can harm your dedicated server is from the inside.
Many spammers do not setup their own servers or paid hosting accounts to send spam. They want to be anonymous. Therefore, they often use other […]

Server OS Profile: OpenBSD

OpenBSD is a derivative of the free and open source Unix operating system BSD, which was first developed at the University of California, Berkeley. The OS is probably best known for its mascot, the puffer fish named Puffy, and also for its very popular sub-project OpenSSH, which is used on many of the servers around […]

How to Create Mail Aliases in Webmin

Webmin is a free and open source system management panel that can handle Unix and Linux system administration on dedicated servers in general and on web hosting servers in particular. You can use it to automate many of the server tasks that would normally require command line work, and creating mail aliases is one of […]

Back to Basics #13: Basic DNS Zone Editing

DNS is one of the most important features of your server. It is what connects your server’s true identity, its IP address, to its human-readable name, also known as its domain name. In order to add domains, sub-domains, or mail server addresses, you need to edit DNS zone entries for your domains. Using a web-based […]

5 Server Logs You Should Routinely Check

One of the important things you can do with a dedicated server is to check it to ensure it is running smoothly and not experiencing any hidden problems. On Linux and Unix servers, log files can provide vital information about key components of your server. The following log files are ones you should routinely check:

Web […]

Starting, Stopping, and Reloading Services

Linux-based dedicated servers typically run two primary types of programs: those which require user interaction and those which perform tasks in the background without user intervention. Those programs that run in the background are commonly called “services” or “daemons”.
Servers usually require numerous services to run the background, such as the web server, mail server, database […]

Troubleshooting High Mail Server Loads

These days many personal email accounts are hosted on cloud servers, leaving many web servers without the need to send and deliver emails to their users. For plenty of businesses, however, having a mail server is still very much a part of the dedicated server experience.
If you host your own mail server, whether Postfix, Sendmail, […]

Server Logs and What They Do

One of the best ways to monitor Linux and Unix servers is to study their server logs. Every operating system and Linux distribution has their own variants, but there are some general logs that most server OSes have. You should definitely be familiar with them if you plan to manage a dedicated server.
The following are […]

How to Enable SSL in Dovecot Mail Server

Dovecot is a free and open source POP3 and IMAP mail system that gives your server’s users access to their email. Many server installations include it out of the box as the default mail box agent, and most use it in conjunction with another mail delivery system.
Dovecot has some security features that may not be […]

Short vs Long Time To Live (TTL) DNS

Time To Live is a term that refers to the amount of time that passes before a DNS zone is updated. If you are running your own DNS on your dedicated server, you may want to consider your TTL setting and how it affects your websites.
The old standard TTL setting for most DNS servers was […]

Anti-Virus and Anti-Spam Tools for Linux Servers

Desktop Linux distributions have a distinct advantage over Windows.  They are not plagued by the millions of viruses that circulate the Internet wreaking havoc on unsuspecting PC users.  These viruses are designed for Windows and normally only affect Windows systems.
Despite the apparent immunity Linux enjoys, a Linux server should still have some type of […]

The Pros and Cons of Cloud Email

Cloud computing has become a very popular option for many businesses hoping to offload some of the expense of maintaining their own mail servers. Cloud email services are easy to setup and use, but there are both advantages and disadvantages to using them.
The Pros

No maintenance – Forget about catching spam and viruses.  Your service provider […]

Dedicated Server Terminology: Part 3

This is a continuation of Dedicated Server Terminology parts 1 and 2.
11. Cache – Caching gives your server a distinct advantage by keeping the most frequently-used data in memory or easily accessible on the disk.  Just as an operating system might cache important application data, you can configure your web server to cache […]

Having a Clear Purpose for Your Server

Adopting a dedicated server is a big step. I have chosen the word “adopt” because it is a lot like adopting a child. You want your child to succeed and get the most out of life, and you want the same for your server. That success will not come without some guidance […]

Local vs. Cloud Email Services

Traditionally, when an individual or company had their own server, it only made sense to also have their own email system. While web-based services existed, they usually required you to have an email address with rather than
Nowadays, many cloud email service providers offer domain-name capabilities, so that your emails appear to be […]

The Value of SPF Records

SPF stands for Sender Policy Framework, and it is the standard established in RFC 4408. Essentially, SPF validates emails sent to a mail server to determine if a message is spam. One of the biggest problems faced by ISPs trying to fight spam is the spoofing of IP addresses and domains. In […]

How to Fix an Open Relay

According to, an open relay is “a mail server that does not verify that it is authorised to send mail from the email address that a user is trying to send from. Therefore, users would be able to send email originating from any third-party email address they want.”
Using an open relay, someone could […]

What is DNSBL and Why Should I Care?

DNSBL stands for DNS Blacklist or Block List and is a list of IP addresses, distributed throughout the Internet, identifying computers or networks accused of spamming. Many web hosts and Internet service providers (ISP) use these blacklists in their anti-spam filters to help keep spam from reaching their users.
DNSBL have received mixed reviews and […]

What to Do When You’re Accused of Spamming

No matter what precautions you take or how many hours, days, or even weeks you have spent hardening your server’s security, the possibility of being accused of sending spam still exists. This can cause you all kinds of problems, from the inability to send mail to certain Internet Service Providers (ISP), to having your […]

Why Go For a Managed Dedicated E-mail Server?

Do you have one or more e-mail clients open even as you read this post? Checking e-mails has become an everyday ritual for almost all of us. If you got a penny for every time you look at your Inbox, you would become richer than Bill Gates! E-mails are as important as water or air […]