SMTP2GO Outage History

SMTP2GO experienced email delivery delays for 3.1 hours due to a failed server in an older network configuration that lacked easy mitigation options. Affected emails showed as "Processed" in the Activity feed but were not being delivered normally. The issue was resolved by implementing traffic re-routing measures and processing the accumulated email backlog.

SMTP2GO's US-based inbound servers experienced degraded performance for 3.5 hours, causing email processing delays, intermittent timeouts, and false "too many concurrent connections" error messages. Users were advised to temporarily switch to the European server (mail-eu.smtp2go.com) as a workaround. The incident was resolved after affecting the SMTP email sending service.

SMTP2GO's email sending service experienced delays for 2.2 hours, causing some users to see emails stuck in "Processed" status on their Activity feed instead of being delivered normally. The development team identified and implemented a fix, restoring normal email flow, though previously processed emails required additional time to update their status.

SMTP2GO experienced email delivery delays in the AU region where emails became stuck in "Processed" status, affecting the SMTP email sending service. The team deployed a fix and monitored email queues as they cleared, with all delayed messages expected to be delivered. The incident was resolved after 1.7 hours of service disruption.

SMTP2GO's inbound mail servers experienced an unusually high volume of traffic, causing delays in email message delivery for users. The Email sending (SMTP service) component was affected for 57 minutes. The development team resolved the incident and advised users to allow time for the message backlog to clear.

SMTP2GO experienced email processing delays in the AU region for 10.8 hours, affecting email delivery speeds while emails showed as "Processed" in the Activity reporting page. The engineering team identified and implemented a fix to resolve the processing backlog. The incident was fully resolved with normal email delivery speeds restored and all reporting records updated.

SMTP2GO experienced a system-wide outage affecting their email sending (SMTP service) for 7.2 hours, causing connectivity issues for users. The company provided alternative server endpoints (mail-us.smtp2go.com and mail-eu.smtp2go.com) as a workaround during the incident. The issue was resolved with a implemented fix after monitoring confirmed stability.

SMTP2GO experienced a 24.2-hour service disruption affecting email delivery to Microsoft-hosted domains (hotmail.com, outlook.com, live.com, etc.), with emails showing as "Processed" but failing delivery with "451 4.7.650" error responses. The issue was caused by a global Microsoft-wide problem that affected multiple email service providers, not a fault with SMTP2GO's systems. The incident was resolved once Microsoft fixed the underlying issue on their end.