Understanding the Email History

This article provides information about Knack's email delivery history, including details about email rules, scheduled tasks, and how to view the history.

This article covers the following topics:

What is the Email History?

Knack maintains a comprehensive record of all emails sent through your form views and scheduled tasks. This feature proves invaluable for verifying successful delivery to recipients, resolving any potential issues with SPAM detection, and more.

Tip: See our guide on emails to learn how to use email rules in your app: Sending Emails.


Locating the Email History

Form Views

You can find the email history in the editor of the form view that contains the email rule.

From the Pages section of the Builder, select your form view to open the view editor and click the "Email Rules" tab. You will find the link labeled "View email delivery history" at the top of the toolbox.

If you do not see the link, it means the view does not have any email rules.

Note: Your email history still stores the history for any form of email rule you may have previously deleted.

Scheduled Tasks

You can find the email history of any scheduled tasks that send out emails from the "History" tab of the task editor. From the Data section of the Builder, click on the "Tasks" tab in a table menu and click on the task with the email rule.

Navigate to the "History" tab where you will find the task run history. Click on the "View email delivery history" option to access a comprehensive list of all the emails that were sent out.

Note: Only the most recent 25 records of the Mail Delivery History will be available.


Viewing the History

Once you've clicked the link, a modal window will appear with a table containing the following columns:

  • Date

  • Recipients

  • Subject

  • Status 



The date the email was sent. You can click on the expand icon to view the content of the message (if available).


The list of recipients that were sent the email. All recipients (To, CC, BCC) are included in a single comma-separated line.


The subject of the email. If you use field values, it will show you the full, rendered subject.



The result of the email delivery. It can be one of the following:






The server is in the middle of queueing the email to be sent.


The email has reached the queue and is being prepared to be delivered.


The email cannot be immediately delivered, but it hasn't been completely rejected. We will continue to try delivering a deferred email for 72 hours.


The email has been received by the recipient's server. This event does not guarantee that the email was placed in the recipient's inbox. It still needs to go through client SPAM filters, etc.


This event informs you when an email has been dropped. Dropped emails will not be re-sent. If you encounter this status, you should contact our support team immediately for more details.

There are a number of reasons your email will not even be sent to a recipient for delivery:

  • The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces.

  • The recipient's address rejected the message. We may need to whitelist your domain. Please contact our support team to request to have your domain be whitelisted.

  • Mailbox unavailable.


The server cannot or will not deliver a message. Bounces are often caused by outdated or incorrectly entered email addresses. Many times you won't know a bounced email address until it bounces.

Ensure that you have the correct and up-to-date email address to prevent your email(s) from bouncing.


The email has been reported as SPAM by the recipient or their email provider. Several SPAM reports may have your account's email privileges revoked; try to avoid sending the same email to these recipients.


The email was not sent because the email originated from an account with emails disabled. All emails are sandboxed on Trial accounts.


Message Body

To see the contents of the email sent from the rule, click on the link in the Subject column. A gray box will show up below with the email body fully rendered.



  • Currently, email history is not available with emails sent with action links or record rules. 

  • Only the most recent 25 records of the email delivery history will be available.

  • All emails are sandboxed on Trial accounts.