Hi, I followed your youtube tutorial and created an amazon web api server on my mailwizz. But when I try to validate the server I get this error: The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details. The Canonical String for this request should have been 'POST / host:email.us-west-2.amazonaws.com x-amz-date:20150523T083747Z host;x-amz-date 8b24a576fbe2084b2dad33020a95a74515be3ea297f4f17f86b1cbafff3e0bb7' The String-to-Sign should have been 'AWS4-HMAC-SHA256 20150523T083747Z 20150523/us-west-2/ses/aws4_request 38381d2e7422595a4bf010446992a65a6386b7d124d338bb52b47ac15551a161' Honestly i dont understand how amazon ses works. I just created the access key and secret access keys as you show in the video, and nothing else. Do I have to do something else? By the way, I put the secret access key in the password field, but after saving the field is empty. I guess is for security reasons.