Outage in VIPRE Security

Outbound Email Rejections from O365 IPs

Resolved Minor
May 19, 2025 - Started 25 days ago - Lasted about 17 hours
Official incident page

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Outage Details

We are currently experiencing an issue where outbound messages sent via our smarthost are being rejected in some cases. The error returned is:

"55X - relay denied"

This appears to affect messages originating from certain Office 365 IP addresses. Our team is investigating and working to resolve the issue.
We will provide updates as we learn more.
Components affected
VIPRE Security VIPRE Email Security
Latest Updates ( sorted recent to last )
25 days ago - at 05/19/2025 06:57PM

We have implemented a fix for the issue causing "55X - relay denied" errors on outbound messages from certain Office 365 IPs. At this time, the issue appears to be resolved, and we are actively monitoring the situation.

25 days ago - at 05/19/2025 05:29PM

We are currently experiencing an issue where outbound messages sent via our smarthost are being rejected in some cases. The error returned is:

"55X - relay denied"

This appears to affect messages originating from certain Office 365 IP addresses. Our team is investigating and working to resolve the issue.
We will provide updates as we learn more.

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