Outage in SMTP2GO
Connection Failures and Delays
Resolved MinorIncident Report
Summary AI Generated
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.
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.
Components affected
SMTP2GO Email sending (SMTP service)Trusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
11 days ago - at 05/04/2026 10:29PM
This incident has been resolved.
INVESTIGATING
11 days ago - at 05/04/2026 07:04PM
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.
Latest SMTP2GO outages
Processed Emails (AU) - 16 days ago
Email Delivery Delays - AU Region - 16 days ago
Inbound Server Issue - about 1 month ago
Investigating Email Processing Delays (AU Region) - about 2 months ago
Network Connectivity Issues - 2 months ago
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