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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

DB5PR03MB1206D3A24F124BDF43A5C6E683D60@DB5PR03MB1206.eurprd03.prod.outlook.com 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: <DB5PR03MB1206D3A24F124BDF43A5C6E683D60@DB5PR03MB1206.eurprd03.prod.outlook.com>
In-Reply-To: <DB5PR03MB1206D3A24F124BDF43A5C6E683D60@DB5PR03MB1206.eurprd03.prod.outlook.com>
Subject: sdfasdf
to: "xxx@gmail.com" <aaa@gmail.com>,<xxxx@xxx.me>
from: aaa@gmail.com
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
Tal Avissar
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  • Have you seen this [SO post](https://stackoverflow.com/questions/32589476/how-to-send-a-reply-with-gmail-api)? It's implementation is in JS but it might give you some idea. – ReyAnthonyRenacia Jul 04 '17 at 12:09

1 Answers1

0

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: "xxx@gmail.com" <aaa@gmail.com>,<xxxx@xxx.me><br />
from: aaa@gmail.com<br />
aaaaaaaaa
Nick
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Easy Hire
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