[Dovecot] Can we know when a user read our email?

[Timo Sirainen]

On Mon, 2012-05-14 at 18:45 +0200, Reindl Harald wrote:
> >  I have seen some emails servers that if I send a email to other
> > person I can see if that person have read our emails and with a option
> > to delete the email if the person hasn't read our email.
> > 
> >  Does dovecot have some like this feature?
> 
> first dovecot is not a MTA, so no
> even if it would be a MTA think about
> how email works:
> 
> * you send a message via SMTP over your MTA
> * your MTA dellivers the message to the target MX
> * how will you bring back any mail after that?

This could work within a single email server, and could be useful in
situations like "oops, I just sent an unfinished email to colleague".

There is also an expired draft to make it work across multiple servers:
http://tools.ietf.org/html/draft-leiba-morg-message-recall-00