Hard Bounce – When a Invalid email address, wrong domain name, rejection by spam filter its hard bounce.
Soft Bounce – Temporary problem caused due to big sizemailing address example philippines of mail, server down or end recipient mailbox full then its soft bounce.
Spam complain rate– Being low on Spam complaint boost reputation.Email spam Spam Button is also used as shortcut to unsubscribe by many users. To avoid this, email must have compelling subject lines.It’s calculated by dividing total number of mail marked as spam to total number of mails delivered.
Unsubscribe Rate – Unsubscribe rate shows where campaign is heading. . Its the rate at which target audience is loosing intrest in campaign.
There is saying that Rome was not built in a day. So as your email marketing Campaigns. Success can only be achieved by clear understanding of goals, measuring the right metrics and consistently acting upon the information received. A right information at the right time with the right action taken on it will count nothing less than a blessing for your email campaign. So its very essential For an Email marketer to succeed by tracking the email marketing KPIs.