Deprecating email, email_on_retry, email_on_failure in BaseOperator

airflow/models/baseoperator.py

@@ -610,11 +610,11 @@ class derived from this one results in the creation of a task object,
         (e.g. user/person/team/role name) to clarify ownership is recommended.
     :param email: the 'to' email address(es) used in email alerts. This can be a
         single email or multiple ones. Multiple addresses can be specified as a
-        comma or semicolon separated string or by passing a list of strings.
+        comma or semicolon separated string or by passing a list of strings. (deprecated)
     :param email_on_retry: Indicates whether email alerts should be sent when a
-        task is retried
+        task is retried (deprecated)
     :param email_on_failure: Indicates whether email alerts should be sent when
-        a task failed
+        a task failed (deprecated)
     :param retries: the number of retries that should be performed before
         failing the task
     :param retry_delay: delay between retries, can be set as ``timedelta`` or
@@ -981,6 +981,24 @@ def __init__(
         self.email_on_retry = email_on_retry
         self.email_on_failure = email_on_failure
 
+        if email is not None:
+            warnings.warn(
+                "email is deprecated please migrate to SmtpNotifier`.",
+                RemovedInAirflow3Warning,
+                stacklevel=2,
+            )
+        if email_on_retry is not None:
+            warnings.warn(
+                "email_on_retry is deprecated please migrate to SmtpNotifier`.",
+                RemovedInAirflow3Warning,
+                stacklevel=2,
+            )
+        if email_on_failure is not None:
+            warnings.warn(
+                "email_on_retry is deprecated please migrate to SmtpNotifier`.",
+                RemovedInAirflow3Warning,
+                stacklevel=2,
+            )
         if execution_timeout is not None and not isinstance(execution_timeout, timedelta):
             raise ValueError(
                 f"execution_timeout must be timedelta object but passed as type: {type(execution_timeout)}"