WebHooks

After you submit an email delivery request to Aurora SendCloud, the system synchronously returns the request result (such as whether the request was accepted). The final delivery result of the email (such as whether it was successfully delivered) and other interaction events (such as opens and clicks) are asynchronously pushed to your specified server via webhook.

Instead of requiring you to poll for updates, Aurora SendCloud actively pushes data to you in real-time when key events occur. This enables subsequent processes like data synchronization, statistical analysis, and triggering business workflows.

How It Works

Event Occurs: When an email-related event occurs (such as an email being opened, a recipient clicking a link, or the email bouncing), Aurora SendCloud generates corresponding data.

Trigger Notification: Aurora SendCloud immediately sends an HTTP POST request to the URL you configured in your account settings.

Data Transfer: The event data is contained within the body of the POST request, typically encoded in JSON format.

Receive & Process: Your server receives the request, parses the data, and handles subsequent business logic (such as updating a database or sending an internal alert) based on the event type.

Supported Event Types

Currently, Aurora SendCloud supports notifications for the following event types (partial list of common events):

Event	Description
Requested	Send request event
Delivered	Message successfully delivered to the recipient's mail server
Open	Recipient opened the email
Click	Recipient clicked a link in the email
Unsubscribe	Recipient clicked the unsubscribe link
Spam Complaint	Recipient complained the email as spam
Invalid Email	Invalid email address
Soft Bounce	Soft bounce (temporary delivery failure)
Inbound Route	Routing status event

For the complete official list of event types and their detailed payload formats, please refer to the [Webhook Event Format Documentation].

Configuration & Usage Steps

Set the Webhook URL: Log in to the Aurora SendCloud platform, navigate to the Webhook settings page, and specify the API endpoint URL on your server that will receive the events.

Validate the Endpoint: Ensure your server can correctly handle any validation requests sent by Aurora SendCloud to confirm URL accessibility.

Parse Event Data: Write code to parse the JSON data in the POST request body and handle it accordingly based on the event type (such as identified by an event field).

Return Success Status: After successfully receiving and processing the data, your server should return a 2xx HTTP status code (such as 200 OK) to Aurora SendCloud. If a non-2xx status code is returned, Aurora SendCloud may attempt to retry the notification based on its retry policy.

Important Notes

Retry Mechanism: If your server is unreachable or does not return a successful response, Aurora SendCloud will typically retry the notification after a delay, up to a predefined retry limit. The retry schedule is as follows: 1 minute, 10 minutes, 30 minutes, 1 hour, 6 hours, 12 hours, and 24 hours. This provides ample time to resolve any issues before the message is lost. If the retry count is exceeded, Aurora SendCloud will store the message for 15 days. For a repush, please contact us.

Security Verification: It is highly recommended to implement security checks in your endpoint code (such as verifying the request source IP against a whitelist or validating a signature) to ensure requests are genuinely from Aurora SendCloud and prevent spoofing.

Processing Performance: Ensure your receiving endpoint can respond quickly (not longer than 3 seconds) to avoid timeouts that might cause Aurora SendCloud to misinterpret the delivery as a failure.

Webhook Event Description

Requested ( request )

Parameter	Type	Description
event	string	event type: “request”
message	string	message content
maillistTaskId	long	task ID will be generated when you send emails with address list
mail_list_task_id	long	task ID will be generated when you send emails with address list
messageId	string	messageId
apiUser	string	API_USER
category	string	message ID
recipientArray	list	recipients
emailIds	list	emailId array
labelId	int	custom label ID
labelName	string	custom label name
recipientSize	int	count of requests
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of “SC-Custom”
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)

Delivered( deliver )

parameter	type	description
event	string	event type: "deliver"
message	string	message content
apiUser	string	API_USER
category	string	API_USER
maillistTaskId	long	task ID will be generated when you send emails with address list
mail_list_task_id	long	task ID will be generated when you send emails with address list
emailId	string	unique ID of each email
outIp	string	outbound IP address
recipient	string	recipients
labelId	int	custom label ID
labelName	string	custom label name
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of "SC-Custom"
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)
deliveryLatency	long	Request-to-delivery latency of email

Open ( open )

parameter	type	description
event	string	event type: "open"
message	string	message content
apiUser	string	API_USER
category	string	API_USER
maillistTaskId	long	task ID will be generated when you send emails with address list
mail_list_task_id	long	task ID will be generated when you send emails with address list
emailId	string	unique ID of each email
recipient	string	recipients
labelId	int	custom label ID
labelName	string	custom label name
ip	string	opened IP address
explorerName	string	browser name
explorerVer	string	browser version
oSName	string	OS name
oSVer	string	OS version
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of "SC-Custom"
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)

Click ( click )

parameter	type	description
event	string	event type: "click"
message	string	message content
apiUser	string	API_USER
category	string	API_USER
maillistTaskId	long	task ID will be generated when you send emails with address list
mail_list_task_id	long	task ID will be generated when you send emails with address list
emailId	string	unique ID of each email
recipient	string	recipients
labelId	int	custom label ID
labelName	string	custom label name
url	string	clicked links
ip	string	clicked IP addresses
explorerName	string	browser name
explorerVer	string	browser version
oSName	string	OS name
oSVer	string	OS version
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of "SC-Custom"
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)

Unsubscribe ( unsubscribe )

parameter	type	description
event	string	event type: "unsubscribe"
message	string	message content
apiUser	string	API_USER
category	string	API_USER
labelId	int	custom label ID
labelName	string	custom label name
maillistTaskId	long	task ID will be generated when you send emails with address list
mail_list_task_id	long	task ID will be generated when you send emails with address list
emailId	string	unique ID of each email
recipient	string	recipients
ip	string	IP address
explorerName	string	explorer name
explorerVer	string	explorer version
oSName	string	OS name
oSVer	string	OS version
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of "SC-Custom"
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)

Spam Complaint ( report_spam )

parameter	type	description
event	string	event type: "report_spam"
message	string	message content
apiUser	string	API_USER
category	string	API_USER
labelId	int	custom label ID
labelName	string	custom label name
emailId	string	unique ID of each email
recipient	string	recipients
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of "SC-Custom"
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)

Invalid Email ( invalid )

parameter	type	description
event	string	event type: "invalid"
message	string	message content
apiUser	string	API_USER
category	string	API_USER
labelId	int	custom label ID
labelName	string	custom label name
maillistTaskId	long	task ID will be generated when you send emails with address list
mail_list_task_id	long	task ID will be generated when you send emails with address list
emailId	string	unique ID of each email
outIp	string	outbound IP address
recipient	string	recipients
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of "SC-Custom"
substatdesc	string	invalid subclass description
substat	integer	invalid subclass
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)
asynchronousBounce	integer	0 indicates synchronous bounce, with a default value of 0; 1 indicates asynchronous bounce. Learn more, please reference to Data

Substat's Return Code and Description

subStat	subStatDesc
401	in SendCloud blacklist
402	unsubscribe
403	server unreachable
404	address format error
405	IP and domain rejected
406	address does not exist
407	spam
408	sender / recipient rejected
409	others

Soft Bounce ( soft_bounce )

parameter	type	description
event	string	event type: "soft_bounce"
apiUser	string	API_USER
category	string	API_USER
labelId	int	custom label ID
labelName	string	custom label name
maillistTaskId	long	task ID will be generated when you send emails with address list
mail_list_task_id	long	task ID will be generated when you send emails with address list
emailId	string	unique ID of each email
outIp	string	outbound IP address
recipient	string	recipients
timestamp	long	timestamp
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	custom header with start of "SC-Custom"
substatdesc	string	soft drop back subclass description
substat	integer	soft drop back subclass
cause	string	reasons for soft credit withdrawal
sendTags	string	Tags for the request (separated by ";", max 5 tags, each up to 50 characters)
asynchronousBounce	integer	0 indicates synchronous bounce, with a default value of 0; 1 indicates asynchronous bounce. Learn more, please reference to Data

Substat's Return Code and Description

subStat	subStatDesc
503	service not available
505	ip or domain rejected
506	email address does not exist
507	spam
508	sender / recipient rejected
509	others

Inbound Route (route)

parameter	type	description
event	string	event type: "route"
message	string	message content "mx route"
timestamp	long	timestamp
from	string	sender email address
fromname	string	sender name
to	string	recipients address
toname	string	recipient name
x_mx_mailfrom	string	envelope sender
x_mx_rcptto	string	Actual recipient address
headers	string	email headers, formatted with JSON
html	string	content in html format of routing email
text	string	content in text format of routing email
subject	string	subject
raw_message_url	string	The download link of the route email, the suffix of the download file is '.eml', and the link is valid for 15 days
raw_message	string	raw email
token	string	random string of 50 characters
signature	string	signature string
userHeaders	string	Custom header with start of "SC-Custom"
reference	string	If there is a value, it is: Message-ID of the email sent by SendCloud
emailId	string	The unique id of the parent email. This field allows the reply email to be associated with the parent email. This value is parsed from reference and In-Reply-To.
labelId	int	Parent email customized label ID
labelName	string	Parent email customized label Name

Note:

When you do not pass in a custom Message-ID, the Message-ID in reference is automatically generated according to the platform rules, and the prefix of the Message-ID is the same as the prefix of the emailid. When you pass in a custom Message-ID through an SMTP request, the Message-ID in reference will be the Message-ID you passed in. When the reply email does not match the parent email, it will be empty.
eg："reference"："1644468027883_1024_25239_6195.sg-10_1_253_1-inbound0@ifaxin.com (opens new window) " #ifaxin.com is the send domain name.
Java parsing EML file example,click here download

Code examples

Python example

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Hex;

public boolean verify(String appkey, String token, long timestamp,
            String signature) throws NoSuchAlgorithmException, InvalidKeyException {
    Mac sha256HMAC = Mac.getInstance("HmacSHA256");
    SecretKeySpec secretKey = new SecretKeySpec(appkey.getBytes(),"HmacSHA256");
    sha256HMAC.init(secretKey);
    StringBuffer buf = new StringBuffer();
    buf.append(timestamp).append(token);
    String signatureCal = new String(Hex.encodeHex(sha256HMAC.doFinal(buf
            .toString().getBytes())));
    return signatureCal.equals(signature);
}

import hashlib, hmac
def verify(appkey, token, timestamp, signature):
    return signature == hmac.new(
        key=appkey,
        msg='{}{}'.format(timestamp, token),
        digestmod=hashlib.sha256).hexdigest()

function verify($appkey,$token,$timestamp,$signature){
    $hash="sha256";
    $result=hash_hmac($hash,$timestamp.$token,$appkey);
    return strcmp($result,$signature)==0?1:0;
}

Experience Now

If you don’t have url to receive data,try services of requestb.in or request this to experience WebHook.

Click Create a RequestBin to generate an url
Configure the URL in SendCloud to receive event data from WebHook
After an operation (request, deliver, open), you can see all POST data of the event in requestb.in