# Update template mail settings ## API Overview Mail Settings instruct SendGrid to apply specific settings to every email that you send over [SendGrid's v3 API](/docs/sendgrid/api-reference/mail-send/mail-send) or [SMTP Relay](/docs/sendgrid/for-developers/sending-email/building-an-x-smtpapi-header/). These settings include how to embed a custom footer, how to manage blocks, spam, and bounces, and more. For a full list of Twilio SendGrid's Mail Settings, and what each one does, see our [Mail Settings documentation](/docs/sendgrid/ui/account-and-settings/mail/). You can also manage your Mail Settings in the [Twilio SendGrid App](https://app.sendgrid.com/settings/mail_settings) ## Operation overview ```json {"path":"https://api.sendgrid.com/v3/mail_settings/template","method":"patch","servers":[{"url":"https://api.sendgrid.com","description":"for global users and subusers"},{"url":"https://api.eu.sendgrid.com","description":"for EU regional subusers"}]} ``` **This endpoint allows you to update your current legacy email template settings.** This setting refers to our original email templates. We currently support more fully featured [Dynamic Transactional Templates](/docs/sendgrid/ui/sending-email/how-to-send-an-email-with-dynamic-transactional-templates/). The legacy email template setting wraps an HTML template around your email content. This can be useful for sending out marketing email and/or other HTML formatted messages. For instructions on using legacy templates, see how to ["Create and Edit Legacy Transactional Templates](/docs/sendgrid/ui/sending-email/create-and-edit-legacy-transactional-templates/). For help migrating to our current template system, see ["Migrating from Legacy Templates"](/docs/sendgrid/ui/sending-email/migrating-from-legacy-templates/). ## Operation details ### Authentication API Key ### Headers ```json [{"in":"header","name":"Authorization","required":true,"default":"Bearer <>","schema":{"type":"string"}},{"name":"on-behalf-of","in":"header","description":"The `on-behalf-of` header allows you to make API calls from a parent account on behalf of the parent's Subusers or customer accounts. You will use the parent account's API key when using this header. When making a call on behalf of a customer account, the property value should be \"account-id\" followed by the customer account's ID (e.g., `on-behalf-of: account-id `). When making a call on behalf of a Subuser, the property value should be the Subuser's username (e.g., `on-behalf-of: `). See [**On Behalf Of**](/docs/sendgrid/api-reference/how-to-use-the-sendgrid-v3-api/on-behalf-of) for more information.","required":false,"schema":{"type":"string"},"refName":"#/components/parameters/OnBehalfOf","modelName":"__components_parameters_OnBehalfOf"}] ``` ### Request body ```json {"schema":{"type":"object","example":{"enabled":true,"html_content":"<% body %>"},"properties":{"enabled":{"type":"boolean","description":"Indicates if you want to enable the legacy email template mail setting."},"html_content":{"type":"string","description":"The new HTML content for your legacy email template."}}},"encodingType":"application/json"} ``` ### Responses ```json [{"responseCode":"200","schema":{"description":"","content":{"application/json":{"schema":{"type":"object","required":["enabled","html_content"],"properties":{"enabled":{"type":"boolean","description":"Indicates if the legacy email template mail setting is enabled."},"html_content":{"type":"string","description":"The HTML content of your legacy email template."}}},"examples":{"response":{"value":{"enabled":false,"html_content":"

<% body %>Example

\n"}}}}}}},{"responseCode":"400","schema":{"description":"","content":{"application/json":{"schema":{"type":"object","properties":{"errors":{"type":"array","items":{"type":"object","required":["message"],"properties":{"error_id":{"type":"string","description":"The ID associated with the error."},"field":{"description":"The field that generated the error.","nullable":true,"type":"string"},"message":{"type":"string","description":"The error message."},"parameter":{"type":"string"}}}}}}}},"refName":"#/components/responses/MailSettingsError400","modelName":"__components_responses_MailSettingsError400"}},{"responseCode":"401","schema":{"description":"","content":{"application/json":{"schema":{"type":"object","properties":{"errors":{"type":"array","items":{"type":"object","required":["message"],"properties":{"error_id":{"type":"string","description":"The ID associated with the error."},"field":{"description":"The field that generated the error.","nullable":true,"type":"string"},"message":{"type":"string","description":"The error message."},"parameter":{"type":"string"}}}}}}}},"refName":"#/components/responses/MailSettingsError401","modelName":"__components_responses_MailSettingsError401"}},{"responseCode":"403","schema":{"description":"","content":{"application/json":{"schema":{"type":"object","properties":{"errors":{"type":"array","items":{"type":"object","required":["message"],"properties":{"error_id":{"type":"string","description":"The ID associated with the error."},"field":{"description":"The field that generated the error.","nullable":true,"type":"string"},"message":{"type":"string","description":"The error message."},"parameter":{"type":"string"}}}}}}}},"refName":"#/components/responses/MailSettingsError403","modelName":"__components_responses_MailSettingsError403"}},{"responseCode":"404","schema":{"description":"","content":{"application/json":{"schema":{"type":"object","properties":{"errors":{"type":"array","items":{"type":"object","required":["message"],"properties":{"error_id":{"type":"string","description":"The ID associated with the error."},"field":{"description":"The field that generated the error.","nullable":true,"type":"string"},"message":{"type":"string","description":"The error message."},"parameter":{"type":"string"}}}}}}}},"refName":"#/components/responses/MailSettingsError404","modelName":"__components_responses_MailSettingsError404"}},{"responseCode":"500","schema":{"description":"","content":{"application/json":{"schema":{"type":"object","properties":{"errors":{"type":"array","items":{"type":"object","required":["message"],"properties":{"error_id":{"type":"string","description":"The ID associated with the error."},"field":{"description":"The field that generated the error.","nullable":true,"type":"string"},"message":{"type":"string","description":"The error message."},"parameter":{"type":"string"}}}}}}}},"refName":"#/components/responses/MailSettingsError500","modelName":"__components_responses_MailSettingsError500"}}] ``` Update template mail settings ```js const client = require("@sendgrid/client"); client.setApiKey(process.env.SENDGRID_API_KEY); const data = { enabled: true, html_content: "<% body %>", }; const request = { url: `/v3/mail_settings/template`, method: "PATCH", body: data, }; client .request(request) .then(([response, body]) => { console.log(response.statusCode); console.log(response.body); }) .catch((error) => { console.error(error); }); ``` ```python import os from sendgrid import SendGridAPIClient sg = SendGridAPIClient(os.environ.get("SENDGRID_API_KEY")) data = {"enabled": True, "html_content": "<% body %>"} response = sg.client.mail_settings.template.patch(request_body=data) print(response.status_code) print(response.body) print(response.headers) ``` ```csharp using System; using System.Collections.Generic; using System.Threading.Tasks; using SendGrid; public class Program { public static async Task Main() { string apiKey = Environment.GetEnvironmentVariable("SENDGRID_API_KEY"); var client = new SendGridClient(apiKey); var data = @"{ ""enabled"": true, ""html_content"": ""<% body %>"" }"; var response = await client.RequestAsync( method: SendGridClient.Method.PATCH, urlPath: "mail_settings/template", requestBody: data); Console.WriteLine(response.StatusCode); Console.WriteLine(response.Body.ReadAsStringAsync().Result); Console.WriteLine(response.Headers.ToString()); } } ``` ```java import com.sendgrid.*; import java.io.IOException; import org.json.JSONObject; import java.util.HashMap; public class Example { public static void main(String[] args) throws IOException { try { SendGrid sg = new SendGrid(System.getenv("SENDGRID_API_KEY")); Request request = new Request(); request.setMethod(Method.PATCH); request.setEndpoint("/mail_settings/template"); request.setBody(new JSONObject(new HashMap() { { put("enabled", true); put("html_content", "<% body %>"); } }).toString()); Response response = sg.api(request); System.out.println(response.getStatusCode()); System.out.println(response.getBody()); System.out.println(response.getHeaders()); } catch (IOException ex) { throw ex; } } } ``` ```go package main import ( "fmt" "github.com/sendgrid/sendgrid-go" "os" ) func main() { apiKey := os.Getenv("SENDGRID_API_KEY") host := "https://api.sendgrid.com" request := sendgrid.GetRequest(apiKey, "/v3/mail_settings/template", host) request.Method = "PATCH" request.Body = []byte(`{ "enabled": true, "html_content": "<% body %>" }`) response, err := sendgrid.API(request) if err != nil { fmt.Println(err.Error()) os.Exit(1) } else { fmt.Println(response.StatusCode) fmt.Println(response.Body) fmt.Println(response.Headers) } } ``` ```php /sendgrid-php.php'; $apiKey = getenv("SENDGRID_API_KEY"); $sg = new \SendGrid($apiKey); $request_body = json_decode('{ "enabled": true, "html_content": "<% body %>" }'); try { $response = $sg->client ->mail_settings() ->template() ->patch($request_body); print $response->statusCode() . "\n"; print_r($response->headers()); print $response->body() . "\n"; } catch (Exception $ex) { echo "Caught exception: " . $ex->getMessage(); } ``` ```ruby require 'sendgrid-ruby' include SendGrid sg = SendGrid::API.new(api_key: ENV['SENDGRID_API_KEY']) data = JSON.parse('{ "enabled": true, "html_content": "<% body %>" }') response = sg.client.mail_settings.template.patch(request_body: data) puts response.status_code puts response.headers puts response.body ``` ```bash curl -X PATCH "https://api.sendgrid.com/v3/mail_settings/template" \ --header "Authorization: Bearer $SENDGRID_API_KEY" \ --header "Content-Type: application/json" \ --data '{"enabled": true, "html_content": "<% body %>"}' ```