trying to reply to an existing email with gmail API

Question

I'm trying to reply to an existing email with Gmail API:

Since I don't have in the existing mail that i want to reply to the headers of References, In-Reply-To then i'm using the Message-ID instead to fill what I'm sending

[e-mail] is the Message-ID header of existing mail.

I've created the following RFC-802:

Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
References: <[e-mail]>
In-Reply-To: <[e-mail]>
Subject: sdfasdf
to: "[email protected]" <[email protected]>,<[email protected]>
from: [email protected]
aaaaaaaaa

then i get an error:

that an error occured the message wasn't sent.

I read this post but this post presumes that always i have the following two headers:

1. References
2. In-Reply-To

Sokoto

Have you seen this SO post? It's implementation is in JS but it might give you some idea. – Mcadoo

Answer 1

Remove References and set In-Reply-To : Message-ID

Content-Type: text/plain; charset="UTF-8" <br />
MIME-Version: 1.0<br />
Content-Transfer-Encoding: 7bit<br />
In-Reply-To: Message-ID<br />
Subject: sdfasdf<br />
to: "[email protected]" <[email protected]>,<[email protected]><br />
from: [email protected]<br />
aaaaaaaaa

Plenipotent

It would be good to reformat as code and clearly specify what parts should be filled in. – Crispation