Specific data includes status, API_ USER, recipient, request time, send time, request IP, send IP, send log.

The current status of e-mail sent by users can be divided into four categories: sending , delivered, soft bounce, invalid email.

  • Sending : the email requested by the customer has been successfully received by EngageLab, queued for sending or retrying sending

  • Delivered : successfully delivered to MP (mailbox provider)

  • Soft bounce : after the mail is delivered, it is soft returned. EngageLab divides the soft return reasons into six sub categories by analyzing the content of the soft return email

    • Sever Error : MP internal service cannot be delivered
    • IP rejection : MP returns to inform that the email sending is rejected due to IP or domain name related reasons
    • Not Exist : MP returns to inform this email address does not exist
    • Spam Rejected : MP returns to inform that the sending behavior or content of this email is determined as spam
    • Rejected : MP returns to inform the sender that the email was rejected abnormally or because of recipient settings
    • Others : other reasons
  • Invalid email : mail delivery failed. EngageLab divides the failure reasons into eight sub categories by analyzing the MP feedback delivery information

    • Blacklist : the email address is in the EngageLab blacklist and will not be delivered
    • Unsubscribe : once a user clicks the unsubscribe link, he will enter the unsubscribe list, and EngageLab will not deliver such e-mail addresses
    • Server Error : temporary or permanent connection of EngageLab sending pool cannot access MX service of receiving domain
    • Format Error :  EngageLab or MP determines that the email address format is illegal
    • Not Exist : MP returns to inform this email address does not exist
    • Junk Mail : MP returns to inform that the sending behavior or content of this email is determined as spam
    • Rejected : MP returns to inform the sender that the email was rejected abnormally or because of recipient settings
    • Others : other reasons

EngageLab blacklist

During sending, if the e-mail address is in the bounce list, custom interception or complaint, the e-mail address will fail to send due to EngageLab blacklist interception.

Customers can specify email address, email type, label and API_ USER, request period and delivery status are used to filter the data, and the mail status data of up to 30 consecutive days can be viewed at a single time.

When exporting a large amount of mail status data, please use offline export.


You can see whether the current sending queue is in normal processing status by “Data”-“Queue”.

Specific data includes status, API_ USER,receiving domain,total of emails to be sent,rate (In,Try out,Out).

You can change the rate and view the average rate every 5s, 15s, and 30s ,and the change trend can be viewed through the chart (refresh the data every 5s).

When the queue is paused, the reason caused the pause and the next sending time will be shown. Click the Recover to trigger the sending immediately.

The pause of queue indicates that the mail delivery is blocked. The reason is related to the receiving mechanism of MP. Common reasons for suspension include :

  • The limitations caused by the domain
  • The limitations caused by IP reputation
  • Frequency of IP connection

If the duration of pause is unreasonable long(2-3 days), please contact the customer service for assistance.


You can view the time point, link and IP information of each email.


For the email sent by the customer to the user, the user can carry out a series of operations such as "reporting", "marking garbage" through MP. Some MPs will feed back spam information to the sender, mostly through ARF format mail report transmitted through FBL.

When the email is spam reported by the recipient, the recipient's address will enter the spam report list and the user's blacklist.

Due to the garbage report, the addresses that enter the EngageLab blacklist will have an expiration time of 180 days. Before the expiration time, if we continue to send letters to these addresses, we will no longer try to deliver the address, and we will directly return the reason 'Blacklist:complaint (worker:address in complaint list)'.

You can specify the email address and occurrence time period to filter the data, or delete the selected data. The next mail will be delivered directlyIn order to avoid users' second complaint or bad impression on your email, it is recommended not to delete it at will


Customers can upload their own blocked email list.

EngageLab will intercept the mail of the domain or mailbox in the list. The failure reason is: "Blacklist: Block:(worker:address in block list)".

The specific data of user-defined interception list includes: email address, receiving domain and API_ USER, create time, expiration time, etc.


[Bounce] is the email address that is actually send through EngageLab, and the MP returns "address does not exist".

EngageLab will intercept the address within the validity period, and return the failure reason "Blacklist: Bounce(worker:address in bounce list)".

Because there is no address in EngageLab blacklist, if it is Tencent mailbox, the expiration time is n-1 power of 2 days, the maximum expiration time is 30 days, and the expiration time of non Tencent mailbox is 30 days (N = 1), 60 days (N = 2) and 180 days (N > = 3). N is the number of hits when the return address sent by the system to this mailbox does not exist

The use of back mail interception can filter the non-existent email address and reduce the credit deduction. There is no charge for messages that fail "Blacklist: Bounce(worker:address in bounce list)".

For some addresses that don't want to be blocked in the return list, you can query and set uninterception.


You can view the time when each email was unsubscribed by the user and the reason. If the user has unsubscribed, we will not  post next time, but return the invalid reason "unsubscribe".

Unsubscribe reason : the reason selected by the user when unsubscribing. It includes the following four types:

  • I don't want to receive such mail anymore.
  • This is not my subscription
  • This is spam
  • This is a fraudulent email


You can view the task list of account offline export mail status .

Specific data includes task progress, type, task start time, task end time, download link.

When the task status is successful, click the download link to download the data file; When the task status is failed, it may be caused by unstable network. You can try again or contact online customer service to solve it.

Offline data files are only saved for 7 days. Please download them in time.

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