Eric
Wed May 07 23:30:00 PDT 2008
Thank everyone very much for suggestions
Based on my case, sender successfully sends email to receiver for hotmail
account. Therefore, let assume that hotmail does not accept sender using
Dynamic IP Address, at this moment, sender still using Dynamic IP Address for
SMTP, but they change the domain name for email, such as @abc.com, which is
using Static IP Address. Sender can successfully send email, even through
they are using Dynamic IP Address for SMTP, therefore, hotmail only check
for domain name to confirm a Static IP Address. Am I right?
Thank everyone for any suggestions
Eric
"Michael Santovec" wrote:
> There's nothing you can do to prevent anyone from sending an e-mail with
> your e-mail address as the From header, just as you can't prevent anyone
> from sending a postal mail and putting your name and address as the
> return address.
>
> I don't know how much checking Hotmail does.
>
> A receiving mail server can check that the IP address of the sending
> server matches the domain name it claims to be.
>
> It could also check that the From header domain matches the domain that
> the mail server claims to be. But there are legitimate reasons why they
> could differ, as when a sending mail server supports multiple domains.
>
> --
>
> Mike -
http://pages.prodigy.net/michael_santovec/techhelp.htm
>
>
>
> "Eric" <Eric@discussions.microsoft.com> wrote in message
> news:B59ED7E3-53E6-47D9-92CA-23B3F9815714@microsoft.com...
> > Thank you very much for your suggestions
> > If anyone can put anybody else's email address in the sender email
> > address
> > field without authorization required, can they receive anybody else's
> > email
> > address?
> >
> > Furthermore, if the domain name for email address uses dynamic IP
> > Address,
> > which is not allowed to send into any hotmail account based on their
> > policy.
> > Can anyone put anybody's else email address, which domain name uses a
> > static
> > IP Address, and send into any hotmail account. Even through anyone is
> > using a
> > dynamic IP Address, but from the viewpoint of hotmail server, which
> > can see a
> > static IP Address, and skipping the hotmail policy.
> > I look forward to your reply
> > Thank you very much for any suggestions
> > Eric
> >
> > "N. Miller" wrote:
> >
> >> On Wed, 7 May 2008 07:28:08 -0700, Eric wrote:
> >>
> >> > For example, enquiry@abc.com, @abc.com is my domain name, receiving
> >> > email
> >> > uses POP3, and sending email uses SMTP, can any unknown sender send
> >> > any
> >> > out-going email under John@abc.com without getting any authority
> >> > from the
> >> > source abc.com? If they can successfully send out email, do they
> >> > access my
> >> > SMTP illegally?
> >> > Thanks in advance for any suggestions
> >>
> >> Anybody can put anybody else's email address in the sender email
> >> address
> >> field. No authorization required (except in rare cases, where the
> >> service
> >> provide requires verification of the sender email address). They
> >> normally
> >> can't access any SMTP message submission server without access
> >> permissions
> >> granted by the server administrator; unless the server is
> >> intentionally
> >> configured as an open relay.
> >>
> >> --
> >> Norman
> >> ~Shine, bright morning light,
> >> ~now in the air the spring is coming.
> >> ~Sweet, blowing wind,
> >> ~singing down the hills and valleys.
> >>
>
>