Klaviyo

Marketing

Website

Resolving…

Description

Klaviyo is an email and SMS marketing platform designed for e-commerce businesses. It provides advanced segmentation, automation workflows, and personalization tools to help businesses send targeted marketing messages and drive revenue through email and SMS campaigns.

Status Page

https://status.klaviyo.com/

Recent Incidents (Last 24 Hours)

Last refresh: 2026-07-02 19:50 UTC (17m ago)

Yahoo PH01 Block — Email Bounces to Yahoo/AOL Recipients

Resolved

The block within the Yahoo infrastructure that resulted in these elevated bounces has been resolved. Customers can safely resend to bounced recipients from this time period. This incident has been resolved.

Incident

Location: —

Started: 2026-07-02 12:17 UTC (7h ago)

Updated: 2026-07-02 14:17 UTC (5h ago)

Resolved: 2026-07-02 14:17 UTC (5h ago)

2026-07-02 12:17 UTC (7h ago) : Starting at 02:30AM US/Eastern on 07/02/2026, a subset of customers are currently experiencing an increase in bounced emails to Yahoo and AOL recipients with the reason of "554 Message not allowed - [PH01] Email not accepted for policy reasons.". Our Engineering and Deliverability teams are actively investigating and working with Yahoo to resolve the issue. We do not recommend resending to thos...

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