[READ] Step 1: Are you in the right place?

Issues filed here should be about bugs for a specific extension in this repository.
If you have a general question, need help debugging, or fall into some
other category use one of these other channels:

• For general technical questions, post a question on StackOverflow
  with the firebase tag.
• For general Firebase discussion, use the firebase-talk
  google group.
• To file a bug against the Firebase Extensions platform, or for an issue affecting multiple extensions, please reach out to
  Firebase support directly.

[REQUIRED] Step 2: Describe your configuration

• Extension name: firestore-send-email
• Extension version: 0.1.37
• Configuration values (redact info where appropriate):
  • Authentication Type: Username & Password
  • SMTP password: SG.***
  • SMTP connection URI: smtp://[email protected]:587
  • Email documents collection: mail
  • SendGrid API Key: Full Access permissions (just in case)

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

1. Install the extension with SendGrid as the SMTP provider
2. Configure with proper SendGrid API key (with full access permissions)
3. Create a document in the email collection:

{
  to: ["[email protected]"],
  message: {
    subject: "Test Email",
    text: "Test content",
    html: "<p>Test content</p>"
  }
}

4. Email sends successfully (state shows "SUCCESS")
5. Check the delivery.info object - it shows null or empty values for messageId, accepted array, and response

More context:

• Using the Firestore database and adding the data manually to the document (just for testing first).
• Using the Sendgrid Essentials plan, I gave full access to the API Key.
• I tried the 465 port as well, and I got the same result.
• I tried to enable events and create Sendgrid Webhooks (I don't think it's needed, but anyway doesn't seem to help).
• Once I install the extension, I can see that the Google Build works properly and finishes successfully. I can see the Firebase Function ("ext-firestore-send-email-processQueue") is created with "document.write" permissions.
• I get the email successfully, but the delivery.info is empty.
• I can also see in Sendgrid the email activity (opened/clicked...).

Google Function Logs:

{
insertId: "63041e171002d6a2f032f9a1"
labels: {
execution_id: "rlsrefvltll2"
instance_id: "00afae80436d37e05a0f080139a57251629e30709c762d410bd7527879edfg0311cd4684f7f4892a2b5a5867d900b56c5a190cb7a637f00b41642582b353131dee054c64123ba6285c579cafdac8"
runtime_version: "nodejs20_20250413_20_18_3_RC00"
}
logName: "projects/my-project/logs/cloudfunctions.googleapis.com%2Fcloud-functions"
receiveTimestamp: "2025-04-19T22:05:12.430081981Z"
resource: {
labels: {
function_name: "ext-firestore-send-email-processQueue"
project_id: "my-project"
region: "europe-west1"
}
type: "cloud_function"
}
severity: "INFO"
textPayload: "Delivered message: mail/6JAOe17fF5ugR52ufJDo successfully. messageId: null accepted: 0 rejected: 0 pending: 0"
timestamp: "2025-04-19T22:05:12.181922Z"
trace: "projects/my-project/traces/db985d11a1bd958427c57272b974e18a"
}

Expected result

delivery.info gets populated with data (e.g., "accepted: {the-email}", messageId: "{uuid}").

Actual result

delivery.info always empty.

delivery (map)
attempts 1 (number)
endTime 20 April 2025 at 02:23:32 UTC+4 (timestamp)
error null (null)
info (map)
accepted (array)
messageId null (null)
pending (array)
rejected (array)
response null (null)
leaseExpireTime null (null)
startTime 20 April 2025 at 02:23:32 UTC+4 (timestamp)
state "SUCCESS" (string)
message (map)
html "<p>Test content</p>" (string)
subject "Test Email" (string)
text "Test content" (string)
to (array) 0 "[email protected]"