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IP Warmup

IP warming is the practice of gradually increasing the volume of mail sent with a dedicated IP address according to a predetermined schedule. This gradual process helps to establish a reputation with ISPs (Internet Service Providers) as a legitimate email sender.

SendGrid can automatically warm up dedicated IP addresses by limiting the amount of mail that can be sent through them per hour. The limit determined by how long the IP address has been warming up.

See the warmup schedule to learn how SendGrid limits your email traffic for IPs in warmup.

You can also choose to use Twilio SendGrid's automated IP warmup for any of your IPs from the "IP Addresses" settings menu in the Twilio SendGrid App.

Start warming up an IP address

Start warming up an IP address

POST /ips/warmup

This endpoint allows you to put an IP address into warmup mode.

Authentication

  • API Key

Headers

Authorization
string
default: Bearer <<YOUR_API_KEY_HERE>>
required

Request Body

object
ip
string

The IP address that you want to begin warming up.

{
  "ip": "0.0.0.0"
}

Responses

array[object]
ip
string

The IP address.

start_date
integer

A Unix timestamp indicating when the IP address entered warmup mode.

[
  {
    "ip": "0.0.0.0",
    "start_date": 1409616000
  }
]
object
errors
array[object]

The errors that were encountered.

field
null
message
string

A message explaining why the IP couldn't entered into warmup mode.

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