How to tell if your SMTP server has been blocked . . .
I sent out a promo to my opt-in list the other day and got virtually no response. This is very uncharacteristic of the list, and I wonder if my server has been blocked, but I haven't received any notification.
In addition, I ususally get a LOT of email responses, but this time, I got three (list is 6K+).
How can I know if I, for whatever reason, have had my server blocked?
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