Incident Open

Incident Started

Some users may be unable to send Exchange Online email messages

We have been made aware of certain users may be unable to send Exchange Online email messages. Affected users may receive the following error “503 5.5.1 bad sequence of commands”

The issue is currently with Microsoft who are reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan.

We expect an update on the matter from Microsoft at 10:30 AM

Incident Started

Please be aware that we are currently investigating an issue at our datacentre. We will provide an update following the initial investigation work is completed. 

Incident Started

Please note that we have been made aware of an ongoing Nationwide incident within the UK Mimecast platform. This is causing delays in the sending and receiving of email for Mimecast customers. This does not affect internal messages.

The incident is currently being investigated by Mimecast support and we will provide an update by no later that 1pm GMT.

Incident Started

Delay in external email sending/receiving. 
We have had several reports this afternoon that external emails are being delayed when they have been sent. It appears this delay is around 30 minutes. 
We are actively investigating the issues at present to determine if this is a fault from Microsoft or from Mimecast. Further updates will be posted here as soon as we hear more. 
Kind Regards

Incident Started

Degraded Mimecast Service- Delivery Delays
We have been made aware of Mimecast experiencing a degraded service in the UK at present. This is resulting in email delivery being delayed on emails intermittently.
Current Statement from Mimecast on the matter reads: 

We are aware that some customers hosted on our UK grid may be experiencing intermittent delivery delays and messages may be held in the processing queue. We are currently investigating the issue and updates will be posted here as they become available.

To view the status of Mimecast as updates happen, please see the following link:  
We will update as soon as we hear more. 
Kind Regards


Incident Started

We have been made aware of some major connectivity issues affecting some of our clients which has been caused by an issue with one of the major ISPs City Fibre / Entanet. The Full issue is:
Description: Major Incident – INC0107444 – Multiple circuit outage
Current Impact: Impacting Leased Lines as well as Broadband. Unknown number as of yet
Incident Start Time: 22/07/2022 11:57:59
Major Incident Raised: 22/07/2022 12:25:43
Major Incident Manager: Sam Abberley
Location/City: Nationwide
Update Number: 1
Completed Actions:

– Reports of circuit impact into the CityFibre TSC

– CityFibre TSC engaged CityFibre NOC for initial investigations

– CityFibre NOC confirmed an issue seen on active monitoring

– MI process engaged

– MI accepted

– Internal Bridge call scheduled

– NOC investigations ongoing with several examples of affected circuits provided from information gathering by TSC

Current Action Plan:

At this juncture, it has been determined that several tunnels are currently flapping following initial investigations by CityFibre NOC.

We are working to determine as to why the tunnels are flapping in order for restoration works to begin. At this point, we are unable to provide an estimated time of repair however once one is available we will provide it as soon as possible.
We apologise for the disruption and hope to have a further update soon.
Next Update:


Incident Started

We are aware of current performance degradation across some parts of the platform, early indications are pointing to a recent upgrade to Google Chrome causing this.
We are investigating this further to establish the exact cause, we will update you further as soon as we know more.

Incident Started

We are aware of an issue with our upstream providers which they are currently investigating. Please stand by for further updates on this as we are made aware of them.

Incident Started

We are aware there is currently an issue with Duo texts not being sent. We are investigating this now.

Incident Started

We are aware of issues with mail delivery / accessing services within Mimecast for clients using Mimecast for email protection.

This is currently causing inbound and outbound mail delivery issues, and access to the Mimecast personal portal is not currently functioning as expected.

We will post further updates as we receive them.