How to set the bounce address using System.Net.Mai

问题:

I'm trying to implement the Variable envelope return path (VERP) method to manage email addresses (ie when an email I send bounces back I want it to be sent to a specific email address so that I can update my database to avoid sending emails to that email address in the future).

According to this article it is possible to specify the email address a bounce email is sent to. How do you do this in .Net?

For example say I ([e-mail]) want to send an email to you ([e-mail]). If [e-mail] doesn't exist anymore I want yourserver to send the bounce email to bounce-you=[e-mail]). This way when I receive this bounced email I know that [e-mail] is not a valid email address anymore and I can update my database accordingly.

In this example, the bounce address would be: bounce-you=[e-mail]
How do you specify it using System.Net.Mail?

回答1:

The bottom line is that you cannot do this in .NET. You can only set the FROM address, which System.Net.Mail will also use as the Envelope-From.

To do something like this, you would need to use a 3rd party SMTP object like the one I wrote:

http://www.aspnetemail.com

In aspNetEmail, you can do something like:

EmailMessage msg = new EmailMessage();
msg.ReversePath = "[e-mail]

aspNetEmail will use the ReversePath value in the MAIL FROM command during the SMTP Session. I could have easily of called this property "ReturnPath" or "EnvelopeFrom". In retrospect, EnvelopeFrom would have been a better name.