Read Receipt

Question

Hi, i found this problem today:

i'm trying to send mails through your Limilabs lib, and i want to implement the 'request read receipt' function. I do it in this way

MailBuilder builder = new MailBuilder();
builder.AddCustomHeader("Return-Receipt-To", "blabla@gmail.com");

It WORKS, but not always (not for all receivers). For example, in some webmails the request get displayed, in some doesen't.
If receiving mails with Outlook, it does not work again.

Answer 1

Use MailBuilder.RequestReadReceipt method:

MailBuilder builder = new MailBuilder();
builder.RequestReadReceipt();

It adds 3 email headers: Disposition-Notification-To, Return-Receipt-To, X-Confirm-Reading-To, and uses ReplyTo property (Reply-To email header) to fill them.

Please note that, read receipt requests may not always be honored because:

• Email client may not recognize the special
  Disposition-Notification-To header;
• Email client may not implement that functionality;
• End user may have that functionality turned off;
• End user may optionally not choose to send one for your particular email;