管理轉寄功能

您可以使用「設定」為帳戶設定轉寄。如要做為轉寄電子郵件地址，地址必須符合下列其中一個條件：

• 電子郵件地址已通過驗證。如需更多資訊，請參閱「建立及驗證轉寄地址」
• 電子郵件地址與寄件者位於相同網域。
• 電子郵件地址屬於寄件者相同網域中的子網域。
• 電子郵件地址屬於在相同 Google Workspace 帳戶中設定的網域別名。

如果轉寄電子郵件地址不符合其中任一規則，使用 API 設定轉寄功能就會失敗。

如要瞭解如何create、列出、取得或刪除轉寄地址，請參閱 ForwardingAddresses 參考資料。

如要瞭解如何取得或更新轉送設定，請參閱設定參考資料

建立及驗證轉寄地址

您必須先create轉寄地址，才能使用。在某些情況下，使用者也必須驗證地址的擁有權。

如果 Gmail 要求使用者驗證轉寄地址，系統會傳回該地址，並附上狀態 pending。系統會自動將驗證郵件傳送至目標電子郵件地址。電子郵件地址的擁有者必須完成驗證程序，才能使用該電子郵件地址。

不需要驗證的轉寄地址，其驗證狀態為 accepted。

啟用自動轉寄功能

請呼叫 updateAutoForwarding 方法，為帳戶啟用自動轉接功能。這個呼叫需要註冊且已驗證的轉寄地址，以及要對轉寄郵件採取的動作。

舉例來說，如要啟用自動轉寄功能，並將轉寄的郵件移至垃圾桶：

Java

gmail/snippets/src/main/java/EnableForwarding.java

前往 GitHub 查看

import com.google.api.client.googleapis.json.GoogleJsonError;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.gmail.Gmail;
import com.google.api.services.gmail.GmailScopes;
import com.google.api.services.gmail.model.AutoForwarding;
import com.google.api.services.gmail.model.ForwardingAddress;
import com.google.auth.http.HttpCredentialsAdapter;
import com.google.auth.oauth2.GoogleCredentials;
import java.io.IOException;

/* Class to demonstrate the use of Gmail Enable Forwarding API */
public class EnableForwarding {
  /**
   * Enable the auto-forwarding for an account.
   *
   * @param forwardingEmail - Email address of the recipient whose email will be forwarded.
   * @return forwarding id and metadata, {@code null} otherwise.
   * @throws IOException - if service account credentials file not found.
   */
  public static AutoForwarding enableAutoForwarding(String forwardingEmail) throws IOException {
        /* Load pre-authorized user credentials from the environment.
           TODO(developer) - See https://developers.google.com/identity for
            guides on implementing OAuth2 for your application. */
    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault()
        .createScoped(GmailScopes.GMAIL_SETTINGS_SHARING);
    HttpRequestInitializer requestInitializer = new HttpCredentialsAdapter(credentials);

    // Create the gmail API client
    Gmail service = new Gmail.Builder(new NetHttpTransport(),
        GsonFactory.getDefaultInstance(),
        requestInitializer)
        .setApplicationName("Gmail samples")
        .build();

    try {
      // Enable auto-forwarding and move forwarded messages to the trash
      ForwardingAddress address = new ForwardingAddress()
          .setForwardingEmail(forwardingEmail);
      ForwardingAddress createAddressResult = service.users().settings().forwardingAddresses()
          .create("me", address).execute();
      if (createAddressResult.getVerificationStatus().equals("accepted")) {
        AutoForwarding autoForwarding = new AutoForwarding()
            .setEnabled(true)
            .setEmailAddress(address.getForwardingEmail())
            .setDisposition("trash");
        autoForwarding =
            service.users().settings().updateAutoForwarding("me", autoForwarding).execute();
        System.out.println(autoForwarding.toPrettyString());
        return autoForwarding;
      }
    } catch (GoogleJsonResponseException e) {
      // TODO(developer) - handle error appropriately
      GoogleJsonError error = e.getDetails();
      if (error.getCode() == 403) {
        System.err.println("Unable to enable forwarding: " + e.getDetails());
      } else {
        throw e;
      }
    }
    return null;
  }
}

Python

gmail/snippet/settings snippets/enable_forwarding.py

前往 GitHub 查看

import google.auth
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError


def enable_forwarding():
  """Enable email forwarding.
  Returns:Draft object, including forwarding id and result meta data.

  Load pre-authorized user credentials from the environment.
  TODO(developer) - See https://developers.google.com/identity
  for guides on implementing OAuth2 for the application.
  """
  creds, _ = google.auth.default()

  try:
    # create gmail api client
    service = build("gmail", "v1", credentials=creds)

    address = {"forwardingEmail": "[e-mail]"}

    # pylint: disable=E1101
    result = (
        service.users()
        .settings()
        .forwardingAddresses()
        .create(userId="me", body=address)
        .execute()
    )
    if result.get("verificationStatus") == "accepted":
      body = {
          "emailAddress": result.get("forwardingEmail"),
          "enabled": True,
          "disposition": "trash",
      }
      # pylint: disable=E1101
      result = (
          service.users()
          .settings()
          .updateAutoForwarding(userId="me", body=body)
          .execute()
      )
      print(f"Forwarding is enabled : {result}")

  except HttpError as error:
    print(f"An error occurred: {error}")
    result = None

  return result


if __name__ == "__main__":
  enable_forwarding()

如要停用自動轉介功能，請呼叫 updateAutoForwarding，並將 enabled 屬性設為 false。

轉寄特定訊息

自動轉寄功能會將所有收到的郵件轉寄至目標帳戶。如要選擇性轉寄郵件，請使用篩選器建立規則，根據郵件屬性或內容轉寄郵件。