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On my WordPress dashboard, I see the following error message: “Das Senden wurde wegen eines technischen Problems mit MailPoet...","issue_labels":["bugs","setup","email sending validation"],"source_links":[{"source_url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","original_url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","source_page_url":"/evidence/source?url=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsudden-sending-pause-no-valid-api-key-specified-error%2F","source_api_url":"/api/evidence/source?url=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsudden-sending-pause-no-valid-api-key-specified-error%2F"}]}],"plugin":{"active_installs":500000,"api_url":"/api/plugins/mailpoet","downloaded":67166825,"name":"MailPoet – Newsletters, Email Marketing, and Automation","rating":88.0,"slug":"mailpoet","tags":["email automation","email marketing","newsletter","post notification","woocommerce emails"],"url":"/plugin/mailpoet"},"conversation":{"url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","slug":"mailpoet","source":"support","title":"Sudden sending pause: “No valid API key specified” error","author":"meike297","published_at":"2026-05-30T11:52:00+00:00","resolved":false,"reply_count":4,"collected_at":"2026-06-10T17:13:59+00:00","body_summary":"Hi everyone, I am suddenly having issues with MailPoet on my WordPress 7.0 site. On my WordPress dashboard, I see the following error message: “Das Senden wurde wegen eines technischen Problems mit MailPoet pausiert: Kein gültiger API-Schlüssel angegeben.” (Sending paused..."},"analysis":{"affected_feature":"email sending validation","analyzed_at":"2026-07-06T03:17:06+00:00","complaint_types":["bugs","setup"],"confidence":0.9,"conversation_url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","evidence_quote":"this specific API key error keeps coming back and pausing my email queue again.","intent":"problem_report","issue_labels":["bugs","setup","email sending validation"],"model":"codex:gpt-5.5","opportunity_relevance":0.78,"praise_types":[],"sentiment":"complaint","severity":"high","slug":"mailpoet","source":"support","summary":"MailPoet keeps pausing the user’s email queue because a valid API key is being rejected during scheduled validation."},"comments":[{"position":1,"author":"Ojoma a11n","published_at":"2026-06-03T07:32:00+00:00","body_summary":"Hello there @meike297 , Thank you for reaching out to us. Can you let me know the website connected to your MailPoet account? Looking forward to hearing back from you."},{"position":2,"author":"meike297","published_at":"2026-06-03T15:08:00+00:00","body_summary":"sure! Its meikereist.de I tried again several things, for example I deleted the mails which were stucked/paused. But its still not working. Thank You"},{"position":3,"author":"Gui A. a11n","published_at":"2026-06-09T19:34:00+00:00","body_summary":"Hi there @meike297 , Thanks for sharing your website domain. I can confirm the domain is successfully authenticated and there are no issues on your account. This is most likely an issue that happens when MailPoet’s..."}],"source_links":[{"source_url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","original_url":"https://wordpress.org/support/topic/sudden-sending-pause-no-valid-api-key-specified-error/","source_page_url":"/evidence/source?url=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsudden-sending-pause-no-valid-api-key-specified-error%2F","source_api_url":"/api/evidence/source?url=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsudden-sending-pause-no-valid-api-key-specified-error%2F"},{"source_url":"https://wordpress.org/plugins/mailpoet/","url":"https://wordpress.org/plugins/mailpoet/","original_url":"https://wordpress.org/plugins/mailpoet/","source_page_url":"/plugin/mailpoet","source_api_url":"/api/plugins/mailpoet"}],"source_link_count":2,"market_key":"newsletter","market_name":"Newsletter","market_url":"/markets/newsletter","opportunity_url":"/opportunities/newsletter","opportunity_card":{"key":"forms-leads","name":"lead 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