For security reasons or as a precaution, you may wish to generate a new Secret Key for your Master Account or Sub-Accounts. To reset your Secret Key, simply go to My Account → Master API Key & Sub API Key Management.
Hover your mouse over ‘Manage’ then click the reset icon (left icon).
Once you confirm the reset, please update the Secret Key in every application you use with Mailjet.
Please note, for SMTP sendings, the previous key will be valid for more than one hour, but for API, the key will be updated immediately.

Once you confirm the reset, please update the Secret Key in every application you use with Mailjet.
Please note, for SMTP sendings, the previous key will be valid for more than one hour, but for API, the key will be updated immediately.