Mail is getting rejected when sent using Mandrill API

Question

I am trying to send email using Mandrill API, but I am getting response as below:

{ "email":"_emailid_", "status":"rejected", "_id":"967859c539b1416abc2613b5a3619a46", "reject_reason":"invalid-sender" }

I am sending the mail by hitting curl call on mandrill api like here.

Can somebody tell me what might be reason for the rejection ?

Answer 1

It's been a long time this question was posted, but I guess I still can contribute.

I had the same issue this week when using MailChimp Transactional API calling a POST method through the command curl -X POST
https://mandrillapp.com/api/1.0/messages/send-template
-d '{"key":"","template_name":"","template_content":[],"message": etc... }

and I got the error message :

[{"email":"[email protected]","status":"rejected","_id":"2bff316436814a399fafea22fda4a4dd","reject_reason":"recipient-domain-mismatch"}]

Asking MailChimp's support team about this, they reply , after a couple of days, the following :

The recipient domain mismatch reject reason is specific to demo and trial accounts and refers to a limitation in those accounts. Sending is restricted to the domains you have set up in the account already. This means your recipient would need to be on a domain that you have the same setup as mentioned for your sending address. If you change to a paid account, this restriction would be removed automatically and you could send to any recipients. Plainly put, you can only send to domains you have verified/authenticated on the demo mode.

I use a free account. I search the documentation and several other sources in the internet but I found no reference to this free account limitation. It would be very productive if such limitation was explicitly put.