Looking for some advice, hope it's OK to ask here. I have a few customers over the past several months start getting an unusual amount of messages being blocked or returned when sending via our SMTP servers. I have checked that none of our servers are listed on any databases, but after some querying of the customers involved, I have found that they all have recently been sending mailing to their customer lists. Even though all of them assure me that these lists are only of the opt-in variety, it is the only thing they all have in common and seems to be the problem.
I have also noticed that every time one of these mailings is sent with several AOL users, our servers will be temporarily blocked. Are there some precautions I should take to possible get their mails trusted? Any other advice? -- Robert
