Error: No SenderBase Reputation Score
Our inbound mail servers use IronPort's SenderBase network to determine how to treat incoming SMTP connections. For each IP address it knows about, the SenderBase network assigns a reputation score.
Neither extremely low volume e-mail servers nor new e-mail servers have SenderBase reputation scores. Unfortunately, newly activated spam zombies also do not have reputation scores, since they usually never send e-mail before being activated. Therefore, sending hosts with no reputation scores are considered somewhat suspicious, and are subjected to a rate limit of 10 recipients per hour.
If the system administrator of a legitimate new or low volume mail server wishes the mail server to be exempt from this limitation, they should contact the ITS Help Desk to make the request.
