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Sender Verification

The Sender Verification API exposes multiple endpoints that allow you to programmatically manage the Sender Identities that are authorized to send email for your account. You can also manage Sender Identities in the SendGrid app by selecting Sender Authentication under Settings in the navigation bar. For full app instructions, see Sender Verification.

The Sender Verification API provides a RESTful interface for creating new Sender Identities, retrieving a list of existing Sender Identities, checking the status of a Sender Identity, updating a Sender Identity, and deleting a Sender Identity.

This API offers additional endpoints to check for domains known to implement DMARC, and resend verification emails to Sender Identities that have yet to complete the verification process.

Domain Warn List

GET /v3/verified_senders/domains

Base url: https://api.sendgrid.com

This endpoint returns a list of domains known to implement DMARC and categorizes them by failure type — hard failure or soft failure.

Domains listed as hard failures will not deliver mail when used as a Sender Identity due to the domain's DMARC policy settings.

For example, using a yahoo.com email address as a Sender Identity will likely result in the rejection of your mail. For more information about DMARC, see Everything about DMARC.

Authentication

  • API Key

Headers

Authorization
string
default: Bearer <<YOUR_API_KEY_HERE>>
required

Responses

object
results
object
required
soft_failures
array[string]
required
hard_failures
array[string]
required
object
errors
array[object]
message
string

the error message

field
string or null

the field that generated the error

help
object

helper text or docs for troubleshooting

id
string
{
  "errors": [
    {
      "field": "field_name",
      "message": "error message"
    }
  ]
}
object
errors
array[object]
message
string

the error message

field
string or null

the field that generated the error

help
object

helper text or docs for troubleshooting

id
string
{
  "errors": [
    {
      "field": "field_name",
      "message": "error message"
    }
  ]
}
object
errors
array[object]
message
string

the error message

field
string or null

the field that generated the error

help
object

helper text or docs for troubleshooting

id
string
{
  "errors": [
    {
      "field": "field_name",
      "message": "error message"
    }
  ]
}
object
errors
array[object]
message
string
        
        
        
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