All Clear

5:28am May 29, 2017 -0400

All Clear

Jul 29 - May 28, 2017

A small portion of US2 users are unable to access their accounts. We are working on restoring access as quickly as possible.

11:38pm Jul 27, 2016 -0400

8:12am Jul 28, 2016 -0400

We've identified the issue but are still working on a resolution. Sorry for the interruption.

10:51am Jul 28, 2016 -0400

This issue is now resolved. We apologize for the delay. Please reach out to support if you encounter any issues.

All Clear

Dec 4 - Jul 27, 2016

We are currently having some connectivity issues with our carriers, which is affecting US8 - US12. We are working as quickly as possible to get these back online. We appreciate your patience and will keep you updated.

5:16pm Dec 3, 2015 -0500

5:48pm Dec 3, 2015 -0500

Multiple carriers are down due to fiber cuts near one of our main facilities. We are continuing to work on routing around this outage.

6:25pm Dec 3, 2015 -0500

We are continuing to work as quickly as we can on resolving this outage for us8-us12. We apologize for this outage and its duration and are doing everything we can to get them back online.

6:43pm Dec 3, 2015 -0500

We have found a way to route around the physical fiber outages causing US8-US12 to be down and they are back up. We are testing and monitoring closely and ironing out any kinks as we find them.

8:51pm Dec 3, 2015 -0500

At this point we believe all systems are 100% operational. Please reach out to support if you are experiencing any issues.

All Clear

Sep 29 - Dec 2, 2015

Hello All! We will be working on a few core networking devices for US8-US11 this morning. 8:00AM - 11:00AM. If you see any bumps please let our support team know!

8:20am Sep 28, 2015 -0400

8:50am Sep 28, 2015 -0400

Good to go!

All Clear

Aug 29 - Sep 27, 2015

We are under a DDOS attack that is impacting several user shards. We are working to mitigate.

3:53pm Aug 28, 2015 -0400

4:17pm Aug 28, 2015 -0400

All services are optimal at this time. We remain behind mitigation and are watching our networks closely.

4:46pm Aug 28, 2015 -0400

All services remain up. We are continuing to monitor our infrastructure closely.

All Clear

Aug 23-27, 2015

Connectivity issues in one of our datacenters. We are working to resolve.

5:21pm Aug 22, 2015 -0400

5:46pm Aug 22, 2015 -0400

We are under a DDOS attack. We've moved behind mitigation and are attempting to recover all services.

6:19pm Aug 22, 2015 -0400

At this time the attack is mitigated and all services are functioning normally. We remain behind mitigation and are watching things closely.

8:41pm Aug 22, 2015 -0400

We will remain behind mitigation for some time but all services have been stable for several hours.

All Clear

Aug 11-21, 2015

We are working to resolve issues logging into US10.

10:28am Aug 10, 2015 -0400

11:07am Aug 10, 2015 -0400

After monitoring for awhile, we are marking this resolved. We apologize for the outage and are still watching things closely.

All Clear

Jul 14 - Aug 9, 2015

Starting at 10:30am(EDT) July 13th, We will be performing scheduled maintenance on our networks for US1-US7. No downtime is expected.

7:29am Jul 13, 2015 -0400

5:48pm Jul 13, 2015 -0400

Resolved, no issues reported!

All Clear

Jun 26 - Jul 12, 2015

Howdy, we are currently in the process of preforming network maintenance. The maintenance applies to all customers with accounts on US1-7. While we don't expect any downtime, we will update things here should there be any unforeseen circumstances.

11:34am Jun 25, 2015 -0400

7:05pm Jun 27, 2015 -0400

Network maintenance completed. Thank you for y'alls patience.

All Clear

Jun 4-24, 2015

Howdy, we are currently in the process of preforming some network maintenance. The maintenance applies to all customers with accounts on US8-11. While we don't expect any downtime, we will update things here should there be any unforeseen circumstances.

11:53am Jun 3, 2015 -0400

4:58pm Jun 3, 2015 -0400

Maintenance completed without incident.

All Clear

May 5 - Jun 2, 2015

We are having issues with our monitoring provider. US7-US10 are operating normally. Please visit http://mailchimp.com/contact/support/ to report any issues.

9:40am May 4, 2015 -0400

11:21am May 4, 2015 -0400

The issue with monitoring was resolved. US7-US10 were healthy for the duration of the false alarms. We use many layers of monitoring both internal and external and only the method shared via this status page was impacted.

All Clear

Apr 14 - May 3, 2015

One of our datacenters is experiencing an attack and we are working to mitigate.

10:29am Apr 13, 2015 -0400

12:20pm Apr 13, 2015 -0400

While we remain under active mitigation from the attack, all site access should be stable across all datacenters.

12:54pm Apr 13, 2015 -0400

At 10:05AM EDT we experienced a DDOS attack, while we are continuing to mitigate the effects all shards are fully operational and no data was compromised.

All Clear

Mar 2 - Apr 12, 2015

Our team is performing upgrades today from noon to 4pm EST for US1 - US7. The majority of the work will not be noticed, but there may be brief periods of connectivity loss. Any campaigns interrupted by this work will be automatically retried and sent.

11:50am Mar 1, 2015 -0500

3:36pm Mar 1, 2015 -0500

Work continues but is taking longer than planned to complete. We are extending the window until 5pm EST.

4:55pm Mar 1, 2015 -0500

Maintenance is complete.

All Clear

Feb 23-28, 2015

Our team is performing upgrades today from noon to 4pm EST for US8 - US10. The majority of the work will not be noticed, but there may be brief periods of connectivity loss. Any campaigns interrupted by this work will be automatically retried and sent.

12:14pm Feb 22, 2015 -0500

3:47pm Feb 22, 2015 -0500

This maintenance is complete.

3:47pm Feb 22, 2015 -0500

This maintenance is complete.

All Clear

Sep 19 - Feb 21, 2015

Hi folks, our engineers are aware and currently working on an issue affecting our US8 datacenter. We apologize for the inconvenience and we thank you for your patience.

10:38am Sep 18, 2014 -0400

11:04am Sep 18, 2014 -0400

All clear

All Clear

May 18 - Sep 17, 2014

We're currently under a DDoS attack & our engineers are working hard to mitigate it as quickly as possible. We apologize for the inconvenience, and thank you for your patience.

12:13pm May 17, 2014 -0400

3:20pm May 19, 2014 -0400

We are still under mitigation from DDoS attacks, but all services are functioning normally at this time.

All Clear

May 8-16, 2014

We appear to be under a DDOS attack; our engineers are investigating & working to mitigate. Thanks for your patience.

6:59pm May 7, 2014 -0400

2:39pm May 9, 2014 -0400

While the attack continues, we believe it is fully mitigated at this time. Please let us know if you encounter any issues moving forward.

All Clear

Apr 28 - May 6, 2014

Scheduled maintenance is underway for our US4 & US6 datacenters and will last until around 7pm EDT.

5:57pm Apr 27, 2014 -0400

5:57pm Apr 27, 2014 -0400

If your account is on one of the affected datacenters, you may be unable to log into MailChimp during this time. This maintenance will require us to take the MailChimp application offline for roughly 30 minutes, and will impact tracked links, signup forms, and the API. Scheduled campaigns will be held in our delivery queue, but will send automatically once maintenance is complete.

6:54pm Apr 27, 2014 -0400

Maintenance on US4 and US6 is now complete.

All Clear

Feb 28 - Apr 26, 2014

We're currently under a DDoS attack & our engineers are working hard to restore services as quickly as possible. Apologies for the inconvenience, and thank you again for your patience.

8:42pm Feb 26, 2014 -0500

11:10pm Feb 26, 2014 -0500

Our team is still working to mitigate the effects of an NTP DDoS attack & restore service for all users as quickly as possible. Thank you for your continued patience.

8:18am Feb 27, 2014 -0500

Account access should be restored for most users at this time, but we are still mitigating attacks. We appreciate your continued patience as we work to recover from & resolve these issues as quickly as possible.

If you encounter any unexpected behavior or have trouble accessing your account, please contact our support team directly so we can investigate.

http://www.mailchimp.com/chat

10:14am Mar 5, 2014 -0500

At this time, all systems are functioning normally. If you encounter any unexpected behavior or have trouble accessing your account, please contact our support team directly so we can investigate.

All Clear

Feb 17-26, 2014

On Sunday, February 16 between 3 and 10pm EST, we will be performing network maintenance on our US1, US2, US3, US5, and US7 datacenters that may cause brief periods of latency or connectivity loss.

3:00pm Feb 16, 2014 -0500

9:22pm Feb 16, 2014 -0500

All clear. The maintenance is now complete.

All Clear

Jan 20 - Feb 15, 2014

On Sunday, January 19 at 5pm EST, we have to perform some maintenance in our US1 and US5 datacenters that will cause a period of downtime between 5 and 7pm EST.

5:00pm Jan 19, 2014 -0500

5:11pm Jan 19, 2014 -0500

Scheduled maintenance is underway and will last until around 7pm EST. If your account is on one of the affected datacenters, you may be unable to log into MailChimp during this time.

This maintenance will require us to take the MailChimp application offline for roughly 30 minutes, and will impact tracked links, signup forms, and the API. Scheduled campaigns will be held in our delivery queue, but will send automatically once maintenance is complete.

7:12pm Jan 19, 2014 -0500

Maintenance on US1 and US5 is complete.