SMTP2GO Outage History
SMTP2GO is up right nowPingoru has recorded 51 incidents for SMTP2GO: 37 in the last 12 months and 17 in the last 90 days.
Show as a table
| Month | Incidents | Hours with an open incident |
|---|---|---|
| April 2026 | 3 | 15 of 720 (2%) |
| May 2026 | 1 | 3 of 744 (0%) |
| June 2026 | 2 | 11 of 720 (2%) |
| July 2026 | 2 | 11 of 744 (2%) |
| August 2026 | 3 | 18 of 744 (2%) |
| September 2026 | 9 | 41 of 720 (6%) |
| October 2026 | 4 | 13 of 507 (3%) |
Incidents, newest first
Major October 15, 2026 Softbounce Errors 2h 20m Email sending (SMTP service)
Started Oct 15, 2026, 03:03 PM UTC· resolved Oct 15, 2026, 05:23 PM UTC
- investigating Oct 15, 2026, 03:03 PM UTC
The team recently updated how our servers process traffic. Specifically, SMTP (https://www.rfc-editor.org/info/rfc5321/#section-2.3.8) requires 0x0d immediately before 0x0a; a recent patch to Exim against "SMTP smuggling" has altered its behavior when it encounters a missing 0x0d. The team is looking into rolling back this update, but in the meantime, we are suggesting connecting to 45.33.50.34, 43.228.184.6, or 45.33.53.153 instead of the mail.smtp2go.com hostname as a potential workaround.
- resolved Oct 15, 2026, 05:23 PM UTC
This incident has been resolved.
Notice October 8, 2026 Issues with API- statusCode=500 1h 25m API Servers
Started Oct 08, 2026, 08:28 AM UTC· resolved Oct 08, 2026, 09:54 AM UTC
- investigating Oct 08, 2026, 08:28 AM UTC
It has been brought to our attention that a small number of clients are experiencing statusCode=500 errors when using our API. Our developers are investigating and we hope to have a solution shortly.
- resolved Oct 08, 2026, 09:54 AM UTC
This incident has been resolved.
Minor October 1, 2026 Connectivity Issues 8h 25m Email sending (SMTP service)
Started Oct 01, 2026, 12:38 PM UTC· resolved Oct 01, 2026, 09:04 PM UTC
- investigating Oct 01, 2026, 12:38 PM UTC
Our development team is continuing to investigate the connectivity issues. In the meantime, please try connecting through mail-eu.smtp2go.com or mail-us.smtp2go.com. We also recommend safelisting our new inbound IP addresses, which are listed here: https://support.smtp2go.com/hc/en-gb/articles/227835308-Worldwide-Server-Locations-IP-Addresses-and-Email-Routing
- resolved Oct 01, 2026, 09:04 PM UTC
This incident has been resolved.
Notice October 1, 2026 Connection issues and 'processed' emails 33m Email sending (SMTP service)
Started Oct 01, 2026, 09:10 AM UTC· resolved Oct 01, 2026, 09:44 AM UTC
- monitoring Oct 01, 2026, 09:10 AM UTC
Our team has been adding new servers to increase capacity, which caused some connection issues and 'processed' emails earlier today. This has been addressed now. Please let us know if you continue seeing any issues.
- resolved Oct 01, 2026, 09:44 AM UTC
This incident has been resolved.
Notice September 30, 2026 Issues connecting to mail.smtp2go.com 8m Email sending (SMTP service)
Started Sep 30, 2026, 11:29 AM UTC· resolved Sep 30, 2026, 11:37 AM UTC
- investigating Sep 30, 2026, 11:29 AM UTC
If you're having trouble connecting to mail.smtp2go.com, try connecting to mail-eu.smtp2go.com instead. Some European locations can't resolve to mail.smtp2go.com. This is a temporary issue that should be fixed shortly. Also, please check that no firewalls are blocking connections to the new IPs we've added to mail.smtp2go.com. The IPs can be found here: https://support.smtp2go.com/hc/en-gb/articles/227835308-Worldwide-Server-Locations-IP-Addresses-and-Email-Routing
- resolved Sep 30, 2026, 11:37 AM UTC
This incident has been resolved.
Minor September 30, 2026 Email Delivery Delays - AU Region –
Started Sep 30, 2026, 08:00 AM UTC· resolved Sep 30, 2026, 08:00 AM UTC
- resolved Sep 30, 2026, 08:50 AM UTC
A small number of accounts in our AU region are still experiencing delays. Our developers are currently investigating.
Minor September 29, 2026 Inbound Timeout 1h 51m Email sending (SMTP service)
Started Sep 29, 2026, 08:31 PM UTC· resolved Sep 29, 2026, 10:23 PM UTC
- identified Sep 29, 2026, 08:31 PM UTC
Inbound processing time has decreased due to higher than usual demand. We are adding network capacity to address this.
- resolved Sep 29, 2026, 10:23 PM UTC
This incident has been resolved.
- postmortem Sep 29, 2026, 10:54 PM UTC
We investigated reports of SMTP connection timeouts and found that some of our incoming mail servers had accumulated stuck mail-handling processes. These processes were consuming excessive processing power, reducing the servers’ capacity to handle other connections and potentially causing slow responses or timeouts. Our investigation identified a possible fault in the handling of an SMTP authentication method. Diagnostic checks showed a process attempting to respond after a connection had closed. We are investigating whether this caused the processes to become stuck; the exact trigger has not yet been confirmed. Actions removed the observed resource buildup, but we are continuing to monitor for recurrence. We are preparing mail-server software updates and assessing whether they address the underlying fault. We are also evaluating a safeguard to detect and clear stuck processes before they affect service.
Minor September 25, 2026 Connectivity issues 6h 32m Email sending (SMTP service)
Started Sep 25, 2026, 03:14 PM UTC· resolved Sep 25, 2026, 09:47 PM UTC
- identified Sep 25, 2026, 03:14 PM UTC
Some customers are experiencing timeouts and intermittent connection issues. We have deployed a planned frontend database speed improvement and are actively monitoring performance while continuing to investigate.
- resolved Sep 25, 2026, 09:47 PM UTC
Our team has implemented several changes to improve frontend database efficiency and overall performance. Service has stabilized, and we are no longer seeing the timeouts or intermittent connection issues previously reported. We will continue to monitor performance closely.
Major September 23, 2026 "Activity" Reporting Delay 7h 14m Member Dashboard
Started Sep 23, 2026, 04:24 PM UTC· resolved Sep 23, 2026, 11:39 PM UTC
- investigating Sep 23, 2026, 04:24 PM UTC
Users may notice that delivered emails are currently displaying as “Processed” within their Activity feeds. Our development team is actively investigating the issue and working to identify the cause
- monitoring Sep 23, 2026, 09:13 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 23, 2026, 11:39 PM UTC
This incident has been resolved. If you encounter any emails displaying as “Processed” only moving forward, please reach out to our support team for assistance.
Minor September 21, 2026 Akamai/Linode DNS issue affecting users in EU/UK 20m Member Dashboard
Started Sep 21, 2026, 09:58 PM UTC· resolved Sep 21, 2026, 10:19 PM UTC
- monitoring Sep 21, 2026, 09:58 PM UTC
This incident was caused by a DNS incident at the Akamai/Linode data center in London. More detail can be found here: https://status.linode.com/incidents/fsgmc1p06swx Impact on customers is limited to delays to updates on the Activity/Delivery reporting.
- resolved Sep 21, 2026, 10:19 PM UTC
Linode UK has marked this issue as resolved. SMTP2GO dashboard Activity reports have also been updated.
Minor September 4, 2026 Delivery Delays – Emails to Microsoft Hosted Domains And Others Held as “Processed” 11h 42m Email sending (SMTP service)
Started Sep 04, 2026, 08:58 AM UTC· resolved Sep 04, 2026, 08:41 PM UTC
- investigating Sep 04, 2026, 08:58 AM UTC
Our team is currently investigating an issue causing some emails to remain in the “Processed” state to Microsoft email addresses, resulting in delivery delays and greylisting. We are working to resolve the issue. We recommend safelisting wherever possible: https://support.smtp2go.com/hc/en-gb/articles/360000471954-Allowlisting-IP-Addresses-With-Microsoft-365
- identified Sep 04, 2026, 11:17 AM UTC
While we continue to handle the ongoing issue with Microsoft domains, all indicators point to a larger, global issue with Microsoft itself. We will continue providing updates as they are available. https://groups.io/email-provider-status?isp=Microsoft+365
- identified Sep 04, 2026, 12:04 PM UTC
Microsoft has accepted responsibility for the current email delays. More details can be found on their status page and below: Issue ID: EX1467029 Affected services: Exchange Online Status: Service degradation Issue type: Incident Start time: Sep 4, 2026, 10:19 PM GMT+12 User impact Users may experience a delay in sending and receiving email messages from external domains in Exchange Online. More info Users may experience intermittent “Server busy” errors, affecting multiple mailboxes. Scope of impact This issue impacts users who may be attempting to send and receive email messages from external domains in Exchange Online. This information may be updated as our investigation continues.
- identified Sep 04, 2026, 02:04 PM UTC
We are investigating as this issue has now started affecting other providers, like Gmail
- investigating Sep 04, 2026, 02:26 PM UTC
Our technical team is investigating an issue with some messages to various providers being shown as "Processed" and not reaching the recipient
- monitoring Sep 04, 2026, 02:38 PM UTC
Excess server burden caused by knock on effects from the Microsoft service issue caused abnormal outbound queues. A fix has been implemented and we are monitoring server queues
- resolved Sep 04, 2026, 08:41 PM UTC
This incident has been resolved and mail queues have returned to normal. Thank you for your patience.
Minor August 27, 2026 Connection Issues and Delivery Delays 1h 6m Email sending (SMTP service)
Started Aug 27, 2026, 10:38 PM UTC· resolved Aug 27, 2026, 11:44 PM UTC
- identified Aug 27, 2026, 10:38 PM UTC
We have identified the issue causing some customers to experience connection issues and delivery delays (with emails remaining in the “Processed” state). Our team is working with urgency to resolve the issue and restore normal service.
- monitoring Aug 27, 2026, 11:01 PM UTC
A fix has been implemented, and we are continuing to monitor the results. Connection stability is improving, queue levels are dropping, and delayed emails are being processed.
- monitoring Aug 27, 2026, 11:21 PM UTC
We are continuing to monitor the situation. If you are still experiencing connection issues or delivery delays, please reach out to our support team for assistance.
- resolved Aug 27, 2026, 11:44 PM UTC
This incident has been resolved. We sincerely apologise for the disruption and inconvenience caused. If you experience any further issues with connecting or email delivery, please reach out to our support team for assistance.
Minor August 27, 2026 Delivery Delays – Emails Held as “Processed” 3h 19m Email sending (SMTP service)
Started Aug 27, 2026, 03:20 AM UTC· resolved Aug 27, 2026, 06:40 AM UTC
- investigating Aug 27, 2026, 03:20 AM UTC
Our team is currently investigating an issue causing some emails to remain in the “Processed” state, resulting in delivery delays. We are working to resolve the issue.
- investigating Aug 27, 2026, 03:57 AM UTC
We are continuing to investigate this issue.
- monitoring Aug 27, 2026, 04:52 AM UTC
A fix has been implemented, and we are monitoring the results. The backlog of emails held in the “Processed” state is now being worked through.
- monitoring Aug 27, 2026, 05:18 AM UTC
We are continuing to monitor.
- resolved Aug 27, 2026, 06:40 AM UTC
This incident has been resolved.
Minor August 18, 2026 "Activity" Reporting Delay: EU Customers 13h 14m Member Dashboard
Started Aug 18, 2026, 04:46 PM UTC· resolved Aug 19, 2026, 06:01 AM UTC
- investigating Aug 18, 2026, 04:47 PM UTC
European users may experience a delay in delivery statuses being updated in the dashboard. Our developers are currently working on a fix. Please rest assured that the emails have been delivered successfully despite the delayed status updates.
- resolved Aug 19, 2026, 06:01 AM UTC
This incident has been resolved. If you still have emails showing as "Processed" only, please reach out to our support team who can assist further.
Minor July 25, 2026 Delay in Processing/Delivery of Emails 10h 58m Email sending (SMTP service)
Started Jul 25, 2026, 07:01 PM UTC· resolved Jul 26, 2026, 06:00 AM UTC
- investigating Jul 25, 2026, 07:01 PM UTC
Our developers are investigating an issue causing delays in email processing. Some users on the affected server may see odd emails stuck in the "Processed" stage on their Activity page, whilst others are being delivered.
- resolved Jul 26, 2026, 06:00 AM UTC
This incident has been resolved.
Notice July 1, 2026 Messages Queued as 'Processed' 27m Email sending (SMTP service)
Started Jul 01, 2026, 09:42 AM UTC· resolved Jul 01, 2026, 10:10 AM UTC
- investigating Jul 01, 2026, 09:42 AM UTC
We are currently investigating an issue with email delivery
- monitoring Jul 01, 2026, 10:01 AM UTC
The issue has been identified and addressed
- resolved Jul 01, 2026, 10:10 AM UTC
This incident has been resolved.
Notice June 25, 2026 SMS messages marked as "Sending" 7h 57m SMS Messaging
Started Jun 25, 2026, 10:32 AM UTC· resolved Jun 25, 2026, 06:29 PM UTC
- identified Jun 25, 2026, 10:32 AM UTC
Our SMS partner Message Media is experiencing issues which is resulting in some SMS messages being marked as "Sending". You can subscribe to updates on their status page here: https://status.messagemedia.com/
- identified Jun 25, 2026, 12:20 PM UTC
We are still waiting for more details from our SMS partner, Message Media. You can subscribe to updates on their status page here: https://status.messagemedia.com/
- monitoring Jun 25, 2026, 05:27 PM UTC
Our provider has confirmed that a fix has been implemented and they are monitoring the results: https://status.messagemedia.com/
- monitoring Jun 25, 2026, 05:27 PM UTC
We are continuing to monitor for any further issues.
- resolved Jun 25, 2026, 06:29 PM UTC
A fix has been implemented, and messaging services have recovered. We have completed validation testing and confirmed that message sending and delivery are functioning as expected.
Minor June 1, 2026 Processed emails (EU) 3h 4m Email sending (SMTP service)
Started Jun 01, 2026, 07:31 AM UTC· resolved Jun 01, 2026, 10:35 AM UTC
- investigating Jun 01, 2026, 07:31 AM UTC
We are aware of an issue causing delays in email delivery. Affected emails will appear as "Processed" in the Activity feed. Our development team is investigating and working to resolve the issue.
- investigating Jun 01, 2026, 08:48 AM UTC
We are continuing to investigate this issue at the highest priority level.
- identified Jun 01, 2026, 09:18 AM UTC
The issue has been identified and a fix is being implemented.
- identified Jun 01, 2026, 09:40 AM UTC
The issue has been identified as a failed server that did not have an easy mitigation strategy for its failure, as it was part of an older network configuration. Measures have been put in place to re-route traffic and some delays are anticipated while the backlog gets processed. This is not anticipated to be long. We will have a full review of our strategy around this with the view to eliminate this from happening in the future.
- monitoring Jun 01, 2026, 09:41 AM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jun 01, 2026, 10:35 AM UTC
This incident has been resolved.
Notice May 4, 2026 Connection Failures and Delays 3h 25m Email sending (SMTP service)
Started May 04, 2026, 07:04 PM UTC· resolved May 04, 2026, 10:29 PM UTC
- investigating May 04, 2026, 07:04 PM UTC
Degraded performance of US inbound servers is causing processing delays, intermittent timeouts and incorrect "421 Too many concurrent SMTP connections from this IP address; please try again later." errors. This is isolated to US-based servers. If you are experiencing any of these issues, please try changing the server name to mail-eu.smtp2go.com until further notice.
- resolved May 04, 2026, 10:29 PM UTC
This incident has been resolved.
Minor April 30, 2026 Processed Emails (AU) 2h 9m Email sending (SMTP service)
Started Apr 30, 2026, 06:25 AM UTC· resolved Apr 30, 2026, 08:35 AM UTC
- identified Apr 30, 2026, 06:25 AM UTC
Some users may experience delays and see "Processed" emails on their Activity feed. Our developers have identified the issue and are implementing a fix.
- resolved Apr 30, 2026, 08:35 AM UTC
This incident has now been resolved. New emails should flow as normal. Previously processed emails may take a little longer to update.
Major April 15, 2026 Inbound Server Issue 56m Email sending (SMTP service)
Started Apr 15, 2026, 04:26 PM UTC· resolved Apr 15, 2026, 05:23 PM UTC
- investigating Apr 15, 2026, 04:26 PM UTC
Our development team is currently investigating the inbound mail servers, which are experiencing an unusually high volume of traffic. Users may encounter delays in message delivery while we work to identify the root cause and restore normal performance.
- resolved Apr 15, 2026, 05:23 PM UTC
Our development team has resolved the incident. Please allow some time for the backlog to clear.
Minor March 31, 2026 Investigating Email Processing Delays (AU Region) 10h 44m Email sending (SMTP service)
Started Mar 31, 2026, 11:08 PM UTC· resolved Apr 01, 2026, 09:53 AM UTC
- investigating Mar 31, 2026, 11:08 PM UTC
We are investigating an issue causing delays in email delivery in the AU region. These emails will appear as "Processed" on the "Reports > Activity" page. Our engineering team is currently working to identify the root cause and restore normal processing speeds as quickly as possible.
- identified Mar 31, 2026, 11:58 PM UTC
The issue has been identified, and a fix is being implemented.
- identified Apr 01, 2026, 02:09 AM UTC
A preliminary fix is being implemented and the backlog of processed email is being worked through.
- monitoring Apr 01, 2026, 05:28 AM UTC
A resolution has been implemented and we're continuing to monitor. While the backlog of "Processed" emails is clearing, clients may notice a temporary delay in event updates (such as the "Delivered" status) appearing in the Activity page reporting. These records are being processed and will be fully updated shortly.
- resolved Apr 01, 2026, 09:53 AM UTC
This incident has been resolved.
Major March 2, 2026 Network Connectivity Issues 7h 8m Email sending (SMTP service)
Started Mar 02, 2026, 05:00 PM UTC· resolved Mar 03, 2026, 12:08 AM UTC
- investigating Mar 02, 2026, 05:00 PM UTC
We are investigating a system-wide outage. Users may experience connectivity issues. Please try connecting to mail-us.smtp2go.com or mail-eu.smtp2go.com in the meantime.
- monitoring Mar 02, 2026, 10:36 PM UTC
A fix has been implemented, and we are continuing to monitor.
- resolved Mar 03, 2026, 12:08 AM UTC
This incident is now resolved. We apologize for any inconvenience encountered. If you experience issues connecting to our servers, please reach out to our support team for further assistance.
Notice February 26, 2026 Delays sending to Microsoft-hosted domains 1d Email sending (SMTP service), API Servers
Started Feb 26, 2026, 03:01 AM UTC· resolved Feb 27, 2026, 03:08 AM UTC
- monitoring Feb 26, 2026, 03:01 AM UTC
We are currently aware of a global issue affecting emails sent to Microsoft-hosted domains (such as hotmail.com, outlook.com, live.com, etc.). Emails affected will show as "Processed" on the "Reports > Activity" page, and delivery attempts encounter "451 4.7.650……….." responses. This is a Microsoft-wide issue affecting multiple SMTP providers/ESPs, and we are monitoring it closely as they actively work on a fix. Thanks for your patience.
- resolved Feb 27, 2026, 03:08 AM UTC
This incident has been resolved.
Minor February 13, 2026 Activity Page Headers 13h 34m Member Dashboard
Started Feb 13, 2026, 02:36 PM UTC· resolved Feb 14, 2026, 04:10 AM UTC
- identified Feb 13, 2026, 02:36 PM UTC
We have identified an issue with headers for sent messages not displaying in the Activity page. We are investigating and will update.
- resolved Feb 14, 2026, 04:10 AM UTC
This incident has been resolved.