Why do every marketer/mail sender has to keep his list hygiene?

• To stay away from blacklists
• To keep IP/domain reputation high
• To be able to send to inbox

Benefits of having a clean list

• You will save money by reducing your list size and not sending to invalid mails
• Your ESP or ISP will not make any problems with your mailing
• You will have a better deliver-ability rate and enhanced reputation score

Every mail list decays at an high rate of 20% every year. So make sure to keep bad data out and send only to valid emails