In the era of e-business, all activities are taken online and all documents are shred using a mail service or cloud computing. Companies will get lots of emails as feedback, confidential letters or other documents. If unnecessary mails enter your inbox and you go through all of them, your time is without a doubt going to waste. To prevent this problem of differentiating unnecessary email from useful ones, a service is introduced known as email filtering service. The service may be offered through software, web service or a product form. Many services are accessible for free and they are safe to use.
How do they work?
Email filtering works as a result of software coding that picks up all incoming spam, then eliminating them or rerouting them to a spam folder. They can be embedded with mail servers so a spam mail will never reach the user's mailbox. This email filtering service can also work based on many requirements like senders' email address, subject of email, specific words in subject, or the sort of attachment.
Understanding email filtering service is really easy. An email server with an anti-spam firewall begins reading all incoming messages to know whether they are spam or not. After it gets approval from the anti-spam firewall, the server will start to send the email to you or your businesses' email address. The spam emails are held in your spam folder, from which you'll be able to filter them manually.
Blacklists and White lists:
A list of email addresses from casual and habitual spammers is made. These lists are classified as blacklists. Blacklists are constantly checked and kept up to date by various ISPs and organizations.