Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,239 questions
Intermittent Failures on Azure Communication Services API
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(48, 28.000000000000004%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMB%3C/text%3E%3C/svg%3E)
Matthew Brown
0
Reputation points
Hi, I'm using the Azure Communication Services REST API to send email notifications. I'm having to build some new software to hit the REST endpoint using a presigned request.
Unfortunately the endpoint seems to provide intermittent failures that I can't link to any specific changes in the requests that I'm making.
A successful request looks like this and happens about 1 in every 4
http://<>.europe.communication.azure.com/emails:send?api-version=2021-10-01-preview
Request headers:
Content-Type: [text/json]
Content-Length: [186]
Authorization: [HMAC-SHA256 SignedHeaders=x-ms-date;host;x-ms-content-sha256&Signature=ZR5w1lxG1JEiAQccG3cnvjAKg0zTz6x4DvlyQ4T1PLA=]
X-Ms-Date: [Mon, 11 Dec 2023 22:48:26 GMT]
Date: [Mon, 11 Dec 2023 22:48:26 GMT]
X-Ms-Content-Sha256: [<>+uxQqW4C/k43eL3CZ1yigtM=]
Response headers:
Api-Supported-Versions: [2021-10-01-preview, 2023-01-15-preview, 2023-03-31]
X-Cache: [CONFIG_NOCACHE]
Content-Length: [77]
Content-Type: [application/json; charset=utf-8]
Retry-After: [3]
Mise-Correlation-Id: [31f05201-8a33-472b-85ca-c31d5f3b0a1a]
Operation-Location: [https://<endpoint>.europe.communication.azure.com/emails/operations/e6c54faa-6068-4002-8568-b98168dd541d?api-version=2023-03-31]
X-Azure-Ref: [0upF3ZQAAAAB9p0duI3QuSo/XkK8HTGZmTE9OMjFFREdFMTcxOAA5ZmM3YjUxOS1hOGNjLTRmODktOTM1ZS1jOTE0OGFlMDllODE=]
Date: [Mon, 11 Dec 2023 22:48:26 GMT]
{"id":"e6c54faa-6068-4002-8568-b98168dd541d","status":"Running","error":null}
And every other request looks like so:
http://<>.europe.communication.azure.com/emails:send?api-version=2021-10-01-preview
Status: 401 Unauthorized
Request headers:
Date: [Mon, 11 Dec 2023 22:48:24 GMT]
X-Ms-Content-Sha256: [ozRRLl0xWqrFdvnhh7Lg+uxQqW4C/k43eL3CZ1yigtM=]
Content-Type: [text/json]
Content-Length: [186]
Authorization: [HMAC-SHA256 SignedHeaders=x-ms-date;host;x-ms-content-sha256&Signature=FGKwhCgiroFt_st76cwlfrwQIbvU6knMJoW1VeH7cJQ=]
X-Ms-Date: [Mon, 11 Dec 2023 22:48:24 GMT]
Response headers:
X-Azure-Ref: [0uZF3ZQAAAABF18MkSPe9RaE68NK/v3mlTE9OMjFFREdFMTgxNAA5ZmM3YjUxOS1hOGNjLTRmODktOTM1ZS1jOTE0OGFlMDllODE=]
Date: [Mon, 11 Dec 2023 22:48:24 GMT]
Content-Type: [application/json]
X-Cache: [CONFIG_NOCACHE]
Body:
{"error":{"code":"Denied","message":"Denied by the resource provider."}}
Is this related to rate limiting? If shouldn't there be a retry-after header?
Azure Communication Services
Azure
Azure
A cloud computing platform and infrastructure for building, deploying and managing applications and services through a worldwide network of Microsoft-managed datacenters.
1,454 questions
{count} votes
-
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator2023-12-12T09:47:04.5366667+00:00 @Matthew Brown Thanks for reaching out to Microsoft Q&A, apologize for any inconvenience caused on this.
Based on the error message it looks like the request is getting failed due to authorization not due to rate limiting. Currently Azure communication email service has rate limit of 30mails per minute and 100 mails per hours as mentioned in this documentation. If you are hitting rate limit then the send email action will be failed with error 429 instead of 401.
Could you please send an email with subject line “Attn:Venkatesh |thread title” to AzCommunity@microsoft.com referencing this thread with your ACS email service resource name, client request Id, request headers and body to check and assist you further on this.
-
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator
2023-12-13T05:08:37.9366667+00:00 Matthew Brown Following up to see did you get a chance to check my previous response and help us with requested information to check and assist you further on this.
Sign in to comment
Sign in to answer