How to set up DMARC for Critsend in Valimail

Updated over a week ago

This article covers the SPF and DKIM authentication processes for Critsend and how they are managed in Valimail. While only one of the two authentication methods is required for an email to pass DMARC, our recommendation is to configure both whenever possible.

Configuring DKIM authentication for your Critsend emails

1) Start by adding a CNAME record with the following Name and Value:

Address, Name or Host:


Note that sometimes your domain name might be automatically added to this field. In such cases you will have to leave off "" in the address field.

If your DNS client doesn't support CNAME's with underscores, you will need to add a TXT record instead:

Address, Name or Host:

Value: k=rsa\; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvEpIr9ILg7iXsdMlMst5sCK+MDc4GQDaZDmgLLHHVNn952Jh4zmB1Qp+fBSUzVfcU/qW4hicOMJKRe0bo8nIB/Gvh3CtJuyAFizXCUjDtn2V4t5rg2OEpVkEXHkwUoW43Z5753Q62flW2wb3zuEqoO5fWLUt4rcIqatE+O8zmSwIDAQAB

2) Log into your Critsend account, go to "Account -> Mail Settings" and find the "Signed-by Domain" line.

The corresponding value will be used by email providers to check for an appropriate DKIM record. For instance, if you've used "" in step 1, then you would need to enter "" in this field.

You can also find the instructions on how to set up DKIM and SPF for Critsend, here.

Add a Critsend DKIM key in Valimail

You can find more detailed information on how to add a DKIM key in Valimail, here:

Configuring SPF authentication for your Critsend emails

Once you establish that Critsend is an authorized sender for your domain, you will need to add the service in your Enabled Senders.

You will find more detailed information on how to add a service for your domain in Valimail, here:

Note: We encourage you to use the comment section for any useful information about your sending service, such as the name of the service owner, change request ticket numbers, etc.

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