Sending emails to yahoo address

YvetteCor_28247 I don't see how that is linked to your use of Smarty. You send them from your device's email account to your own email provider's server and then on to the Yahoo address. You need to check that first, particularly if you are able to use data generally. Are you getting a reason for non-delivery? Is the email not sending or not being accepted?  Are you trying to send a very large file for example?