I send out about 500,000 emails every week. I have been sending the list out for about 1 year. But in conversation, I was advised that the company sends in a shared IP manner. So my list goes out with gambling and adult emails; and that their IPs get blocked often. They have 20 IP, when I send out;they cut up my list in roughly 20 pieces and sent out randomly from different Ips. But on a daily basis -their IPs are getting blocked. And if i had emails sent from that IP -it gets hard bounced. But these hard bounces -do not get retried and my list is getting smaller at an alarming basis. I have tried emailing these hard bounces and certain "hard bounces"are a valid email. Is there a proper manner to handle these type of bounces?
In my opinion -if the company knew they had an issue that day with i.e AOL - they should go back into system and re-label those emails that bounced as -soft; and retry again the next week. Right now -all those AOL emails have been permenantly removed from my list.