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  2. Functions
  3. [New] Email
  4. [Initial setting] Set mail delivery
  5. SPF/DKIM/DMARC settings


What are SPF/DKIM/DMARC settings?

SPF settings

SPF (Sender Policy Framework) is a setting that allows the recipient to check whether the domain of the sender's email address has been spoofed as a countermeasure against "spoofing email" that spoofes the sender of the email.
If it is not set, there is a high possibility that the sent mail will be judged as spoofing and will not be received.

For example, when delivering an email from BowNow, the sender email address (From email address) will be the domain set arbitrarily, but the actual sender will be the BowNow system.
Depending on the recipient mailer, spoofing may be judged and reception may not be possible.

Therefore, please set SPF as a countermeasure against spoofed emails in the domain set as the sender email address.

DKIM settings

DKIM (DomainKeys Identified Mail) is an electronic signature-based sender authentication technology that can check whether an email has been spoofed or tampered with sent from a legitimate server domain.
The e-mail sent by the sender is digitally signed, and when the e-mail is received, the recipient queries the DNS server to obtain the public key and verify it.


  • *DKIM information issued by BowNow is 2048 bits. Depending on the DNS record setting company, there is a possibility that the number of characters will be limited.
  • In that case, we will issue 1024-bit DKIM information separately, so please contact support.

DMARC settings

DMARC (Domain-based Message Authentication Reporting & Conformance) verifies the sender address (Header-from) domain displayed in emails and checks whether it matches the domain authenticated by SPF and DKIM. This is a sending domain authentication technology that allows you to determine whether a sender is being spoofed by verifying it.

For more information about DMARC, please see below.



  • *If you have already set up a record for DMARC, there is no need to set up the record provided by BowNow.

From application to completion

Issuance of SPF/DKIM/DMARC setting information

At the bottom of the screen for setting up email delivery, the red "Request SPF/DKIM/DMARC setting information"Please click on the.

Click [Do you want to request SPF/DKIM/DMARC setting information for "domain name"? ] will appear, a red “requestClick the button.

Click the Request button to send the issuance request.
After sending, "Set SPF/DKIM/DMARC for the email address domain" under <Flow from request to start of use> will change to blue.
When it turns blue, the request has been completed.

Set SPF/DKIM/DMARC to the email address domain

After sending the issuance request, we will issue the information for the customer environment.
Please set the issued SPF/DKIM/DMARC information in the DNS of your email address domain.
* Server expertise is required for DNS settings.

About request for setting

When making settings, ask the domain management company you are using or the person in charge in the company such as the information system department.
・Information that you would like to configure SPF, DKIM, and DMARC.
・ Issued DNS information
Please tell us and make the settings.

* Please note that support does not provide guidance on how to describe or set "SPF record settings".

When the DNS settings are complete, check "Completed the above DNS record settings" and click "Request confirmation of DNS settings".

Check SPF/DKIM/DMARC settings

After sending the confirmation request, we will check the information set by your company, and if there is no problem, we will set the mail sending function.After completing the settings at our company, you will be able to use all of the mail delivery functions.

If there is a mistake in the settings

An error (red triangle icon) will be displayed to the left of the host record that has an error, and the error details will be displayed at the bottom.
We have also sent you an email informing you of the error.

Subject: [BowNow] Mail delivery domain "Application domain"SPF/DKIM/DMARC settings could not be confirmed.

We deliver emails with the above contents.
If you do not receive the e-mail, it may be in an unsolicited mailbox, so please check.
If you receive an email, there is a problem with some settings, so please check the settings again and reapply.

BowNow does not provide a way to check the SPF record settings, but you can check it on the following sites.



Also, please check the following as well as the following is a summary of how to write SPF records.

Correct way to write SPF records

Start using the mail sending function

When the setting is completed, <Flow from request to start of use> will not be displayed.

From the request for setting information to the start of using the email sending functionApproximately XNUMX business days at the shortestPlease.
Please note that it may take some time for our work in some cases.

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