OMAR said:
kindly i wanna know how to return an unread email on Microsoft outlook 2007
For what purpose?
Once you receive an e-mail, you have nothing that guarantees you can
identify the true sender of that e-mail. You are NOT the mail servers
involved during the transfer and that is the only time the receiving
mail server truly knows what is the real sending mail server. During
the mail session, the receiving mail server can reject or error on the
transmission. This forces the sending mail server to figure out to
where it must deliver its DSN (delivery status notification) message.
After that mail session is over, all you have to go by are the
return-path headers that the *sender* specified in their message.
If you are planning on trying to retaliate against spammers, they don't
use their true e-mail address. They may use an invalid e-mail address
which means your sending mail server will immediately realize that the
domain does not exist and send you back an DSN report. They may use a
valid domain but no such username exists there, so you waste the
resources of your host, your sending mail host, and the receiving mail
host only to have the receiving mail host reject the transfer (no such
account) and then your sending mail host issues you a DSN message. I
believe leaving the Return-Path header to a null value will tell the
mail hosts to not bother sending back a DNS report but Outlook isn't a
spammer-friendly e-mail client so that option isn't available. Then
there is the spam which has a valid e-mail address but it points at an
innocent, someone that was never involved in sending the spam. You end
up sending them a bogus NDR (non-delivery report) e-mail which equates
to you spamming another user (since you will issue these bogus NDRs as
fast as you receive spam and the innocent wasn't involved so you are
sending an unsolicited e-mail). You become the spammer slamming
innocents with your fake bounces.
Deliberate misdirection of bogus bounces can get you reported to your
e-mail provider and get your account killed. It can also get you on
blacklists which will prevent you from sending any e-mails to that
domain or to any others where the innocents retaliate by reporting your
abuse.
You are NOT the mail server. You have no business in issuing fake
bounces. You have no positive proof as to who is the sender of the spam
(and even you know that spammers aren't going to identify themselves).
You waste the resources of mail hosts with your fake bounces. You
afflict innocents with your NDR "spam". You deserve to get blacklisted
and have your abusive account killed. Retaliation results in you being
part of the spam problem. Those who issue fake bounces are spammers and
will get treated and reported as such.