Re: Not receiveing outside email

From: Lanwench [MVP - Exchange] (lanwench_at_heybuddy.donotsendme.unsolicitedmail.atyahoo.com)
Date: 09/30/04 

Date: Thu, 30 Sep 2004 14:03:19 -0400

mardub wrote:
> I recently installed exch server 2003 on windows 2000 srvphk 3
> machine.
> did not receive any errors during installation. We receiving mail
> when I noticed that I was being used as a relay. I stopped the SMTP
> virtual serverand stopped the relay.
> Since that time I am not able to send and receive email. DNS reports
> that it cannot connect to our email server. Checked the domain name
> and the mx preference = 10
> My server is pointing to my static ip address from my ISP.
> No errors in event viewer.
> Email is sitting in the mailboxes but not being delivered to
> workstations. Cannot receive outside mail.
>
> Please help

Did you restart the virtual SMTP server? If it isn't running, you can't
send/receive any email through it.

Regarding relay:
E2000/2003 out of the box are not an open relay, so unless you changed that,
you aren't. However, authenticated relay is allowed by default. See
http://www.vamsoft.com/orf/authattack.asp

If you don't have strong/complex password policies enabled, force regular
password changes, have enabled guest, etc., someone may exploit
authenticated relay. If you don't need authenticated relay, disable it. You
can always have any external POP users use their own ISP's SMTP server for
outbound mail anyway.

See http://www.msexchange.org/tutorials/MF005.html for a good overview of
relaying and spam.

Relevant Pages

  • Re: Relay issue with our Domain
    ... If you connect toi your SMTP server and tell the SMTP server that your ... from a valid accountb in your domain and then you try to send externally, ... servers allowed to relay. ...
    (microsoft.public.exchange2000.admin)
  • Re: Unable to send from localhost
    ... You may also want to add 127.0.0.1 in the "allowed to relay" dialogue box. ... This should allow the MS SMTP server to relay mail from hosts in the "Allows ... Neither of them monitors the loopback address. ...
    (microsoft.public.inetserver.iis.smtp_nntp)
  • Re: exchange spamming
    ... > delete it from queue i get deleted and again start building up and my ... > spamming software for my mail server. ... E2k/2003 out of the box don't permit open relay, ... If you don't need authenticated relay, ...
    (microsoft.public.exchange.admin)
  • Re: How to Stop relaying from inside the company
    ... note that result, if your SMTP Server is blocking the relay, then the result ... How can i stop relaying from inside the company? ...
    (microsoft.public.exchange.admin)
  • Re: Spoof senders return address, Exchange 2003
    ... the mail she sends will likely be tagged as spam by her correspondents because the SRV record of the domain from which she's sending won't match your sending SMTP server. ... When the user sends out an e-mail from within the SBS domain, can she have the return address pointing to her e-mail at her personal domain? ... The network is prone to misuse so the SMTP virtual server has relay permissions unchecked for authenticated users. ...
    (microsoft.public.exchange.admin)
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