A Clean IP Reputation is an increasingly important asset for Operators as mobile data services contribute a growing proportion and strategic component of Operator’s revenue. We find that spam typically comprises over 85% of all outbound email traffic, consuming valuable bandwidth in networks. The integrity of a network’s public IP address is crucial in ensuring that legitimate subscribers email can delivered, whilst addressing the challenges that virus and spambot infected subscribers bring.
(The animation of the world below shows the location of the most targeted mail servers that common viruses use as measured by AdaptiveMobile)
SMTP spam remains the largest conduit for spam affecting an operator’s IP reputation, and the graph below shows the breakdown of sending accounts that are used to send spam through an operator’s network. This graph shows that the sending domains used do not implement sufficient spam and virus filtering, and are passing the issue back to the operator by including the operator’s IP address as the source.
While SMTP spam is the most prevalent route for spam, with up to 85% of smtp messages sent from a subscriber via an external domain containing spam or viruses, the other key route for operators to protect is webmail. Typically webmail will constitute approximately 58% of email from a network, but only 6-7% of webmail traffic will be spam. We are seeing rapid growth in this, with webmail spam being less than 1% in 2009. This means that an operator’s IP reputation is now as dependent upon blocking webmail spam as it is with SMTP spam.
The graph below illustrates a composite breakdown across our customer base of the webmail accounts that are used to generate spam.