Spam or "junk email" refers to those unwanted or unsolicited emails that we receive regularly (sometimes daily) in our email inbox, which can saturate our inbox. Spam is characterised by its anonymous, massive and unsolicited nature.
Junk email is usually for advertising purposes. Spammers buy huge databases with thousands of email addresses. They often hide the real sender of the messages and often have fraudulent intentions.
If you want to run a successful emailing campaign it is important that you are familiar with the concept of spam and know how to design your messages to avoid being classified as such.
What is a Spam Filter?
Spam filters screen out advertising/massive emails that are sent to an email inbox. These filters use multiple methods to check the content of the email (links, words, etc.), as well as the subject and sender. With this data, the filter determines whether the message is legitimate or spam.
Influence of Spam filters on delivery rate
Design your emails carefully, paying attention to html tags, links and CTA's). If you don't keep an eye on these aspects you run the risk of ending up on a spam blacklist.