Sender Reputation: Easy to Ruin and Hard to Restore
Your sender reputation with ISPs is the key factor which determines what will happen to your email after you click “Send”. Your reputation is built on your email sending activity, and it’s much easier to spoil it rather than restore your good name.
Although many email marketers underestimate it, sender reputation is a big concern. A bad reputation is often the reason for the emails being filtered and not reaching the recipients.