Please explain more about your issue, looks like a configuration issue, please try sending an email to a know email address which is working, then try
sending it with code. Also in your mailing list, if there are addresses which are due for some reason, email is bouncing you need to handle it.
And avoid sending them emails next time or consult your network administrator to check the mail configuration.
Thanks for contacting us.
answered 8/27/2022 8:27:51 AM