Reply to the sender of a message using either JSON or MIME format.
When using JSON format:
Specify either a comment or the body property of the message parameter. Specifying both will return an HTTP 400 Bad Request error.
If the original message specifies a recipient in the replyTo property, per Internet Message Format (RFC 2822), send the reply to the recipients in replyTo and not the recipient in the from property.
Choose the permission or permissions marked as least privileged for this API. Use a higher privileged permission or permissions only if your app requires it. For details about delegated and application permissions, see Permission types. To learn more about these permissions, see the permissions reference.
Permission type
Least privileged permissions
Higher privileged permissions
Delegated (work or school account)
Mail.Send
Not available.
Delegated (personal Microsoft account)
Mail.Send
Not available.
Application
Mail.Send
Not available.
HTTP request
POST /me/messages/{id}/reply
POST /users/{id | userPrincipalName}/messages/{id}/reply
POST /me/mailFolders/{id}/messages/{id}/reply
POST /users/{id | userPrincipalName}/mailFolders/{id}/messages/{id}/reply
Request headers
Name
Type
Description
Authorization
string
Bearer {token}. Required
Content-Type
string
Nature of the data in the body of an entity. Required Use application/json for a JSON object and text/plain for MIME content.
Prefer: outlook.timezone
string
Sets the time zone for the Sent field of the reply message in HTML that this API creates based on the request body. The value can be any of the supportedTimeZones configured for the user. If not specified, that Sent field is in UTC.
Use this header only if you're specifying the Content-Type: application/json header to create the reply message in HTML. If you use the Content-Type: text/plain header, this Prefer header does not have any effect. Optional.
Request body
When using JSON format, provide a JSON object in the request body with the following parameters.
Any writeable properties to update in the reply message.
When specifying the body in MIME format, provide the MIME content with the applicable Internet message headers, all encoded in base64 format in the request body. This method uses the sender of the original message as recipient.
Response
If successful, this method returns a 202 Accepted response code. It doesn't return anything in the response body.
If the request body includes malformed MIME content, this method returns a 400 Bad Request error code and the following error message: "Invalid base64 string for MIME content".
Examples
Example 1: Reply in JSON format to an existing message
The following example includes a comment and adds a recipient to the reply message.
POST https://graph.microsoft.com/v1.0/me/messages/AAMkADA1MTAAAAqldOAAA=/reply
Content-Type: application/json
{
"message":{
"toRecipients":[
{
"emailAddress": {
"address":"samanthab@contoso.onmicrosoft.com",
"name":"Samantha Booth"
}
},
{
"emailAddress":{
"address":"randiw@contoso.onmicrosoft.com",
"name":"Randi Welch"
}
}
]
},
"comment": "Samantha, Randi, would you name the group please?"
}
// Code snippets are only available for the latest version. Current version is 5.x
// Dependencies
using Microsoft.Graph.Me.Messages.Item.Reply;
using Microsoft.Graph.Models;
var requestBody = new ReplyPostRequestBody
{
Message = new Message
{
ToRecipients = new List<Recipient>
{
new Recipient
{
EmailAddress = new EmailAddress
{
Address = "samanthab@contoso.onmicrosoft.com",
Name = "Samantha Booth",
},
},
new Recipient
{
EmailAddress = new EmailAddress
{
Address = "randiw@contoso.onmicrosoft.com",
Name = "Randi Welch",
},
},
},
},
Comment = "Samantha, Randi, would you name the group please?",
};
// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=csharp
await graphClient.Me.Messages["{message-id}"].Reply.PostAsync(requestBody);
// THE CLI IS IN PREVIEW. NON-PRODUCTION USE ONLY
mgc users messages reply post --user-id {user-id} --message-id {message-id} --body '{\
"message":{\
"toRecipients":[\
{\
"emailAddress": {\
"address":"samanthab@contoso.onmicrosoft.com",\
"name":"Samantha Booth"\
}\
},\
{\
"emailAddress":{\
"address":"randiw@contoso.onmicrosoft.com",\
"name":"Randi Welch"\
}\
}\
]\
},\
"comment": "Samantha, Randi, would you name the group please?"\
}\
'
<?php
// THIS SNIPPET IS A PREVIEW VERSION OF THE SDK. NON-PRODUCTION USE ONLY
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new ReplyPostRequestBody();
$message = new Message();
$toRecipientsRecipient1 = new Recipient();
$toRecipientsRecipient1EmailAddress = new EmailAddress();
$toRecipientsRecipient1EmailAddress->setAddress('samanthab@contoso.onmicrosoft.com');
$toRecipientsRecipient1EmailAddress->setName('Samantha Booth');
$toRecipientsRecipient1->setEmailAddress($toRecipientsRecipient1EmailAddress);
$toRecipientsArray []= $toRecipientsRecipient1;
$toRecipientsRecipient2 = new Recipient();
$toRecipientsRecipient2EmailAddress = new EmailAddress();
$toRecipientsRecipient2EmailAddress->setAddress('randiw@contoso.onmicrosoft.com');
$toRecipientsRecipient2EmailAddress->setName('Randi Welch');
$toRecipientsRecipient2->setEmailAddress($toRecipientsRecipient2EmailAddress);
$toRecipientsArray []= $toRecipientsRecipient2;
$message->setToRecipients($toRecipientsArray);
$requestBody->setMessage($message);
$requestBody->setComment('Samantha, Randi, would you name the group please?');
$graphServiceClient->me()->messages()->byMessageId('message-id')->reply()->post($requestBody)->wait();
# THE PYTHON SDK IS IN PREVIEW. FOR NON-PRODUCTION USE ONLY
graph_client = GraphServiceClient(credentials, scopes)
request_body = ReplyPostRequestBody(
message = Message(
to_recipients = [
Recipient(
email_address = EmailAddress(
address = "samanthab@contoso.onmicrosoft.com",
name = "Samantha Booth",
),
),
Recipient(
email_address = EmailAddress(
address = "randiw@contoso.onmicrosoft.com",
name = "Randi Welch",
),
),
],
),
comment = "Samantha, Randi, would you name the group please?",
)
await graph_client.me.messages.by_message_id('message-id').reply.post(request_body)
Example 2: Reply in MIME format to an existing message
Request
The following example shows a request.
POST https://graph.microsoft.com/v1.0/me/messages/AAMkADA1MTAAAAqldOAAA=/reply
Content-type: text/plain
Q29udGVudC1UeXBlOiBhcHBsaWNhdGlvbi9wa2NzNy1taW1lOw0KCW5hbWU9c21pbWUucDdtOw0KCXNtaW1lLXR5cGU9ZW52ZWxvcGVkLWRhdGENCk1pbWUtVmVyc2lvbjogMS4wIChNYWMgT1MgWCBNYWlsIDEzLjAgXCgzNjAxLjAuMTBcKSkNClN1YmplY3Q6IFJlOiBUZXN0aW5nIFMvTUlNRQ0KQ29udGVudC1EaXNwb3Np
Response
The following example shows the response.
HTTP/1.1 202 Accepted
If the request body includes malformed MIME content, this method returns the following error message.
HTTP/1.1 400 Bad Request
Content-type: application/json
{
"error": {
"code": "ErrorMimeContentInvalidBase64String",
"message": "Invalid base64 string for MIME content."
}
}