How to check if the mail has been sent successfully

Question

I am developing an Asp.Net application, where I am sending a mail to the user\'s email address, if he forgets the password.

I want to check if the mail has been sent

Answer 1

No. E-mail (SMPT based) is an unreliable transport protocol and although there are some hacks to detect that an e-mail has been received and read, e.g. by embedding an individualized image URL in the e-mail and tracking that the image has been requested by the recipient's client, there is no absolutely reliable way to fulfil your request.