Earthlink is opening up their feedback loop to ESPs.

Earthlink is opening up their feedback loop to ESPs.

To take advantage of this, requests should be sent to fblrequest@abuse.earthlink.net with the following information:

• mail server range(s) (IPs/CIDRs)
• FBL address (where complaints are directed)
• technical contact email
• ESP name and contact info

Everyone has delivery issues

Check out my confirmation email from returnpath.com

It too is not immune to the junk folder.

Why does this matter to you?

If you're in the email delivery space, every piece of email matters.

email delivery rates

It's all about email isn't it?

Here are the current delivery rates of sending mail to the major ISP's.

 NOTE: X axis are number of ips trying to connect and send email.

To undertand the graph a little better I'll explain in a little more detail:


You can tell if you're trying to send SMTP to Earthlink. There is little to no ramping period. They don't throttle you to prevent email traffic. It's either an OK ip address, or a REJECTED ip address.

Yahoo has a ramping period before near 100% acceptance. A very short ramp to 45% success and you're okay to keep sending mail. Then there is a looooong ramp up period. You should adjust your ramping for small increments on messages to send per min. The next plateau to hit is 88% success delivery, and then a shorter ramp to 100% success

The configuration for delivering to each ISP changes as acceptance of emails do. The number of emails per connection, the number of connections per ip, the number of retries per minute, the number of emails per min, and add infinitude.

There is no magical formula for all. A consultant is needed, the likes of a

John Caldwell

www.linkedin.com/in/jacaldwell/ is a good start.






Remember, in order of importance for best delivery:
1. subscriber engagement, time viewing emails(YES!), clicks, opens
2. spam trap hits
3. abuse complaints
4. bounce rates