This just started today. Went I send an email I get and error message saying I can’t send emails from this server. I haven’t changed any settings. I deleted the xfinity app and reinstalled, log out and back in, updated software on IPad and rebooted I pad. I can’t fix this. Please help
Are you using the Mail app that came on the iPad? If so, try just signing into the account through Safari and see if the same thing happens.