[IMail Forum] unknown user

[Krishna]

can anyone help me we are getting emails back when our staff sends to few domains as  unkown users. This problem is comming since we installed firewall and since i am not sure how to solve for temp solution i have keyed the ipaddress and domain name in system32/drivers/etc  hosts file and it worked fine for other domains but one domain fails even i specify in the hosts.   when i do nslookup my dns can resolve the correct ipaddress's but still its bounce back   Thanks and regards Krishna     Unknown user: [EMAIL PROTECTED] > Unknown user: [EMAIL PROTECTED] > > > Original message follows. > > Received: from xxx [219.65.60.28] by mail.xxx.com with ESMTP >   (SMTPD32-6.06) id AEA820CA01A2; Mon, 09 Aug 2004 20:31:36 +0800 > Message-ID: <[EMAIL PROTECTED]> > From: "Sanjeet Halbe" <[EMAIL PROTECTED]> > To: "M.Aras/Excel,India." <[EMAIL PROTECTED]> > Cc: "Hari/Excel" <[EMAIL PROTECTED]> > References: <[EMAIL PROTECTED]> > Subject: Re: Time to Thank you... > Date: Mon, 9 Aug 2004 18:00:19 +0530 > MIME-Version: 1.0 > Content-Type: multipart/alternative; > boundary="----=_NextPart_000_0065_01C47E3A.BBCB91E0" > X-Priority: 3 > X-MSMail-Priority: Normal > X-Mailer: Microsoft Outlook Express 6.00.2800.1106 > X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 > > This is a multi-part message in MIME format.