This is the million dollar question, and here by now i am explaining what are spam email and how spam filter works?Why its so obvious that majority of people switched to Gmail rather than choosing other email services (yahoo,live), back when it was launched Gmail offered superior spam fighting capability, other than 1GB of Free Storage. Over the years, Gmail has refined its Spam filter technology and it has almost no email escapes its filter and land into inbox. Practically, I personally observed only 2-3 spam mails per month in my inbox among other hundreds of mails that I receive in my daily routine. So let’s see how Google has managed to achieve such a high accuracy and what elements comprises of its spam filter.
Do you Know?
Spam costs money you may not realize that every e-mail message has a cost associated with it, but it does. Transporting data across the Internet costs money because access providers must invest in increased transmission and storage capacity as traffic increases. You can’t easily identify the cost as you can with mailing a letter, but it’s there. However, since Internet users generally don’t pay more if they transfer more data, spammers can send out millions of messages just as cheaply as they can send one. The cost is shared by everyone who uses the Internet, including you.
Starting with the Basic:
# What is SPAM Emails and what are there Types:
In simple words spam refers to submitting the same message to a large group of individuals in an effort to force the message onto people who would otherwise choose not to receive this message.
There are basically two types of spam:
#1 Email spam refers to spam email that is directed at individual users with direct addresses; email spam lists are usually created by scanning usenet postings, sterling Internet mailing lists or searching the Web for addresses. A variant of this form of spam is sent directly to mailing lists and email discussions that are used by public and private forums. Email spam costs individuals submitting spam email money; for example, ISPs and onine services need to pay to transmit spam directly to subscribers.
#2 Cancelable usenet spam: This type of SPAM refers to spam email in which a single message is sent to 2 or more than 2 usenet groups. This type of spam is directed at “lurkers”, or individuals who read newsgroups but who either do not or infrequently post or give their email addresses away. Cancelable usenet spam reduces the utility of newsgroups by forcing through advertising, and as such decreases the ability of administrators and managers of newsgroups to manage accepted topics. This spam is run at a low cost to those sending out spam.
Also Read: Find out skype contacts Emails from facebook
In addition, there are three main components to all types of spam:
- anonymity: the sender’s identity and address are concealed
- mass mailing: spam email is sent to a large number of recipients and in high quantities
- unsolicited: the individuals receiving spam would otherwise not have opted to receive it
Common forms of spam include commercial advertising, usually for dubious products, such as get-rich-quick schemes, quasi-legal services, political messages, chain letters and fake spam used to spread viruses.
# Spam Filter -What is Spam Filter and how Spam filter works?
Consider a Spam filter as a funnel. This funnel is the collection of various factors and algorithms that decides whether the message or email is legitimate one or not. The number of factors could be typically range between 10 to 50 and an alarm from even a single factor is more than enough to mark that message as spam.
Also Read: How To Obtain Email Senders Ip Address
# How Spam Filter Works in Gmail?
Whenever someone mail you, it is made to pass through a spam funnel. If the message satisfies the funnel filtering criteria, it lands in your inbox, else it is been transferred to your spam folder. The funneling happens in the real time i.e. just before receiving the message, Gmail applies spam filter to it. The funnel checks depend on various major factors as given below:
What comprises Spam Filter does?
Spam filter is made of various factors which indicate the possibility of maliciousness. These factors depend on various actions/events such as –
1) Whenever Gmail system detects that the message has malicious links and trying to scam user through a phishing mail.
2) When the message is sent from unknown/unconfirmed sender who does not exist in any of your past interactions.
3) When you have already marked any such similar mail as spam beforehand.
4) When the message is in different language than the languages you will normally use.
5) When many people marked same message as spam.
6) When the message is sent from reported email id or banned server or lesser known domain.
7) When it has similarity to suspicious messages and proactive words like “Get Rich Quickly” or “Free Goodies” .
In Addition, if you are using Gmail for apps, then the admin (organization IT department) can also set policies to mark mails as spam from other organizations.
Difference Between Spam and Online Advertising?
Factors written above make us think that online advertising falls under spamming. But this might not necessary be true. If you have explicitly given your email address and permission to advertise, then it doesn’t become part of spamming. When you don’t ask for it and until it’s not familiar to you, it is spam.
A very thin line differentiates both of them, and it mainly depends upon your personal preference. For example, you gladly accept 2-3 minutes of commercials during TV breaks however you get annoyed with in-program advertising. The difference lies upto the point it becomes annoying it is spam else advertising.
Online advertising is necessary evil, which offsets the cost of all the freely available information. Spam, on the other hand, increases the associated cost.
And in case you are wondering on how to reduce the number of spam messages, then the answer is very straight forward.Here are some other Handy tips to escape from spammers:
# Handy Tips to get rid of Spams:
1. Move spam messages to your email Junk folder. This will in future automatically block messages from the same sender. Or just delete them
2. Do not report spam messages you receive to SID, they can only tell you to move them to your Junk folder or delete them
3. Be aware that spammers often use false addresses which they frequently change, so you may have to move new items to Junk as they arrive
4. Unsubscribe from websites you have signed up to if you no longer want to receive emails from them
5. Do not use your University email address to sign up to private websites
6. Use the Clutter feature to automatically remove unwanted emails from your Inbox – for more details see Mailbox cleanup