Hello Ajeet,

 

Do you have any more detail about how you have set up the ip rotation?

To explain a little about how this feature works, it is designed so that ips can be rotated through if one is consistently failing. Along with the list of ips there is a "Rotate List Fail Ratio" setting and a "Rotate List Fail Threshold" setting. The threshold is used so that you can get a sufficient amount of results before it starts checking the ratio. And the ratio is the ratio of successes to failures before the system should rotate off that ip. So if you have the ratio set to 0.4 and only 30% of the messages sent by the ip succeed it will begin to use another ip in the rotate list.