Getting a No Boundary error on Mandrill-api gem Rails 4.1 with Actionmailer, what content_type to use

Question

Emails without attachment are delivered fine, but when there is attachment I get boundary missing error on mandril:{"code": -98,"name": "ValidationError","message": "Invalid raw_message: Bad.

Answer 1

I have recently been wrestling with this

Answer 2

There is another way of looking at this issue that you might find interesting
I have achieved good results using this one https://github.com/mikel/mail

Comments

Something like this would work

---

I have spent a lot of time to solve this problem and at last I found it there. Used only if you really need to

---

You can also have a look at this related question

Answer 3

You can check out the results at multipartform-data | Apache Help Blog

Comments

This version works fairly well. It does not do bounds checking and can overflow your buffer

Answer 4

This is a very enlightening article https://spirirobit.files.wordpress.com/2015/10/message-not-sent-error-code-98.pdf
A robust implementation would probably define these