JMAP Email/query Sorting by receivedAt Not Working

[mudasir477]

I am using Stalwart Mail Server with JMAP to retrieve emails from my inbox. I want to sort emails by receivedAt in descending order so that the latest emails appear at the top. However, regardless of whether I set "isAscending": true or "isAscending": false, the response remains the same (unsorted).

JMAP Request Body

{
"using": [
"urn:ietf:params:jmap:core",
"urn:ietf:params:jmap:mail",
"urn:ietf:params:jmap:submission",
"urn:ietf:params:jmap:vacationresponse",
"urn:ietf:params:jmap:sieve",
"urn:ietf:params:jmap:blob",
"urn:ietf:params:jmap:quota",
"urn:ietf:params:jmap:websocket"
],
"methodCalls": [
[
"Email/query",
{
"accountId": "dp",
"filter": {
"inMailbox": "a"
},
"sort": [
{
"property": "receivedAt",
"isAscending": false
}
],
"collapseThreads": true,
"position": 0,
"limit": 1000,
"calculateTotal": true
},
"0"
],
[
"Email/get",
{
"accountId": "dp",
"#ids": {
"resultOf": "0",
"name": "Email/query",
"path": "/ids"
},
"properties": [
"messageId",
"attachments",
"threadId",
"mailboxIds",
"keywords",
"hasAttachment",
"from",
"to",
"subject",
"receivedAt",
"size",
"preview",
"cc",
"bcc",
"bodyValues"
],
"fetchTextBodyValues": true,
"fetchHTMLBodyValues": true
},
"1"
]
]
}

What I Have Tried

1. Confirmed that receivedAt exists in the Email/get response and is in ISO 8601 format (e.g., "2025-02-12T10:15:30Z").
2. Tried sorting by sentAt instead of receivedAt, but the issue persists.
3. Tested both isAscending: true and isAscending: false, but results remain unchanged.
4. Disabled collapseThreads (set to false), but sorting still does not work.

Expected Behavior
Sorting should work as expected when "isAscending": false, displaying newest emails first.

Actual Behavior
The response remains in the same order, regardless of the sorting parameter.

Questions

1. Does Stalwart Mail Server fully support sorting on receivedAt?
2. Is there any known bug or limitation related to sorting emails via JMAP?
3. Are there additional settings required to enable sorting?

Any guidance on this issue would be greatly appreciated. Thanks! 🙌

[mdecimus]

Which client are you using to build the requests?

[mudasir477]

I am using Angular 17 with HTTP Client to build the requests. I have also tested the same requests in Postman, but the results remain the same in both cases. Let me know if you need any specific details about the request or response.

[mudasir477]

Which client are you using to build the requests?
Any updates. me waiting your response.
Thanks