Valid Mailjet API keys rejected with no reason
The plugin rejects Mailjet API and Secret keys that the owner has verified as correct, with no way to see why.
Tier I · Proven The best-established problems.
7 public reports · first reported 23 August 2023 · last reported 27 April 2026
What's going wrong
Many owners report that the Mailjet plugin shows an error saying the API key and Secret key are wrong, even after they checked the keys, regenerated them, reinstalled the plugin, or switched to a new version. No detail appears in the console or the PHP log, so they cannot tell whether the fault is in the keys, the account, the domain verification, or the plugin code. Some tried other plugins and themes with the same result. The reports come from owners on newer versions and on new WordPress installs, and they cannot find out what to change. A diagnostic tool that tests the connection step by step would give owners a path to a working setup.
AI-assisted: written with the help of AI from the reports.
Products affected
Mailjet Email Marketing.
Related problems
Who has this problem
1 business found.
Unlock them at the top of this page — $19.
All sales are final — no refunds.
Each business's name, the address it published, and the page it was published on. Paid through Stripe; you get a private page to bookmark, with a CSV download.