Spam that is considered to be equivalent of junk mail is usually sent to promote a particular product or service. Also used by hackers, it is considered unsafe for websites since it can gather personal information about credit cards or passwords. It is difficult to eliminate spam altogether but paying close attention to this problem and using anti-spam techniques can to a great extent combat it.
The web world of today has brought many great things before us but together with it has evolved few worst things, and one of them is SPAM. Spam is defined as an e-mail message that is sent to people without permission or consent. The address of recipients are often gathered from postings or squeeze pages in the websites or even purchased from various database companies. Special software is used by the spammers that send hundreds and thousands of messages to the addresses at a single click of a mouse. The problem of spam has reached its heights and it needs drastic action before the situation escalades any further.
Every day when we view our email accounts we are sure to find some unwanted mails, and these unwanted mails termed as spam is a phenomenon that has become beneficial for some people and a nuisance to the larger part. Most of us have to accept them grudgingly like unavoidable conditions and delete them right away. But, if you want to get rid of this burden then the best option is to ask your hosting service company to block potential spam e-mails. Providing safety against such emails has become a great burden for most IT professionals but with recent technologies and developments it has become possible to avoid the spammers.
Effective Spam Fighting Methods
- Black Lists:
- A black list is a database or listing and that is the chief source of spam. You can set your mail server with a black list and can configure your server to check all inbound emails against the black list. Messages that originate from these sources can easily be blocked. Good blacklist services are DBSL and SpamCop.
- Email Filters:
- Email filtering services help to quarantine viruses, email threats and spam before reaching the servers on your network. It acts as a filter preventing and protecting delivery of emails considered as spam.
- The first thing of defense against any hackers, spammers and crackers is a firewall. Firewall is essential as it protects your entire network from the disaster that hackers try to bring to your network.
- Check relay setting:
- The server’s relay setting checks which computers and servers have the right to send SMTP emails on behalf of the organization. Limit the IP address to email users or else spammers will misuse your mail server and send unwanted mails.
- Block port 25:
- Allow your outbound traffic on TCP port 25 as it is used for email traffic. Blocking this port will prevent mass mails and spam zombies to be sent from your computers and this is also a good security practice.
- Reverse DNS:
- Reverse DNS usually have an IP address with a domain name and they compare the email address domain name with the IP address and if it doesn’t match, it is considered as a spam.