Attention McAfee Email Protection Clients:

McAfee has released the following service alert:

“A network issue in North America has impacted Web Protection and Email Protection traffic  for some customers.  We are in the process of enacting our emergency failover processes to try and restore service as soon as possible.

Web Protection customers may experience issues connecting to the proxy service and Email Protection customers may see delays in both inbound and outbound mail processing.

There may also be ancillary services that see degraded performance as well such as Quarantine release, ClickProtect, Control Console access, Message Continuity Unspool, and Archiving ingest.”

For more information, please see

Tier1Net has received increased reports of legitimate emails being delayed with the senders receiving a temporary failure message of  “451 Exceeding Connection Limit: RBLDNSD.”

Tier1Net has traced the issue to a new Spam Flood Prevention policy recently enabled by McAfee.  This new policy was designed to reduce the impact of certain spam campaigns characterized by unusual spikes in traffic over short periods of time, by withholding delivery until traffic returns to a normal threshold.

However, Tier1Net has observed a high volume of “false positive” delays, wherein McAfee identifies legitimate senders as spam campaigns.

As a result, Tier1Net has disabled the McAfee Spam Flood Prevention feature for all of its McAfee Email Protection customers.

For more information, please visit

As you may have read in the news recently, Google’s Postini AntiSpam service is being phased out and replaced by GoogleApps.  While the phase out will begin to affect some users as early as January of 2013, none of Tier1Net’s users will be affected until much later in the year, around October 2013.

At this point, there is no immediate cause for concern.  Tier1Net’s Postini AntiSpam Users will continue to receive the same robust antispam service as always.

Well before the deadline, we will be announcing transition options for our clients.  Currently we are still evaluating the alternatives to Postini’s AntiSpam service.  Our number one priority is to provide the best AntiSpam product available to our clients, along with a seamless migration from Postini AntiSpam.

Our Postini AntiSpam Users should expect to hear from us in the upcoming months with the transition options.  Until then, if you have any questions about the Postini Phase Out please give our office a call. 781.935.8050