This is the error i am now getting. PERM_FAILURE: SMTP Error (state 13): 530 Authentication required for acceptance of any mail
I was told by my ISP that they were getting reports that people were receiving spam from our mail server IP address. I turned on SMTP Authentication and Anti Hammering. We are able to send out messages but when some one tries to send us one the mail gets bounced back to them with that fallowing error. If i turn off SMTP Authentication we can send and receive emails but the mail server starts to get flooded with Outgoing Mail connections and thousands of mail sitting in que. I am at a loss of what to do. This is our primary business email and we need it for our company. Any help here would be great.