6:45am Pacific — BTinternet has responded and confirmed that all of our IP addresses should no longer be rate-limited. We have not been informed by BT why the issue occurred in the first place, but are continuing to press BT for that information. We will post any substantive responses from BT here.
11:15am Pacific — As part of an ongoing effort to improve our operational infrastructure, we are planning a 1-hour maintenance window for the MAX Mail control panel, beginning this Friday evening at 8 PM Pacific / 11 PM Eastern / 3 AM GMT (Saturday). We expect the control panel to be off-line for a portion of that window, and customers will be unable to make any configuration changes during this time. Mail flow will not be impacted.
9:30am Pacific — We received a response from BTinternet, which has fixed the problem with at least one of the affected IP addresses. We have asked that they review the other IP addresses on our network, and we have asked for information as to why the issue occurred. We appreciate your patience as we work through this with BT.
7:30am Pacific — We have been seeing an increasing number of deferrals when attempting to deliver outbound mail to the btinternet.com servers. We have made many attempts to contact responsible personnel at btinternet, but unfortunately they have been non-responsive thus far. We are unaware of any unusual activity, mail flow, or other changes on our part that may have caused their mail system to begin rate-limiting our traffic.
Affected customers (mostly in the UK) may elect to use our North American infrastructure for their outbound relay, as that does not appear to be affected at present. We are investigating the feasibility of diverting traffic destined for BT through alternative networks, although that may not be effective and ultimately the problem needs to be resolved at BT. We are continuing our attempts to reach authoritative personnel at BT, and would encourage affected customers with relationships with BT to likewise contact their account managers to expedite resolution of the issue.
12:30am Pacific — The engineering team has determined the cause of the quarantine release issue, and has implemented a fix. Messages previously released from quarantine should now be delivered, along with new released messages. We apologize for any inconvenience.
11:15pm Pacific — We are hearing reports of issues with releasing messages from quarantine, by which the released messages are significantly delayed or not delivered. The engineering team will be investigating this and we will post an update here when more information is available.