Well I have a list of nearly 60K emails. These emails are collected from my company Exchange server database. These email senders sent emails to our company for various purpose. But mostly for business purpose indeed. I decided to use the list to send some promotional emails for my company. I subscribed some ESP but almost all of they refused the list as they think the list is not created through opt-in. Even though I was ready to send them prove that the email list is from our exchange server but they are not willing to see any prove as they think emails they can allow list collected through a clear concise message that I will send the subscriber promotional messages.
However now I am planning to use a software rather ESP. I tried atomic email sender but this has a lot of problems. The biggest problem is atomic email sender cant send emails without SMTP and using one web mail I cant send more than 100 emails per hour.
Can anyone tell me if there is any really good software / cloud service / ESP which in my case can help me to send few promotional emails?