[IMail Forum] Undeliverable Domains.

[Michael U]

I’m having a problem with sending emails to certain domains.  We are not blacklisted.  I’m using IMail 6 and this week, users have been complaining that their emails are not making it to their recipients.  Some get errors and some do not.  I tried sending test emails to the problem domains with a different email server and those went through.  I then tried changing the external DNS server, both in IMail and in Windows 2000 but I still have the same problem.  When my users do get errors, they look like this:   undeliverable to [EMAIL PROTECTED]     Original message follows.   Received: from SMTP32-FWD by wecatapult.com   (SMTP32) id A00000460; Mon,  7 Oct 2002 15:46:12 -0400 Received: from msx.tricompictures.com [63.169.10.9] by mail1.globalwebcentral.com with ESMTP   (SMTPD32-6.06) id A484B01DE; Mon, 07 Oct 2002 15:46:12 -0400 content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain;       charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: RE: test X-MimeOLE: Produced By Microsoft Exchange V6.0.5762.3 Date: Mon, 7 Oct 2002 15:39:05 -0400 Message-ID: <[EMAIL PROTECTED]> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: test Thread-Index: AcJuORhufERpuuyLRM6V9lrUVKB9CAAABepw From: "admin" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED]   Has anyone experienced this problem?    As Always, Thanks in advance.   Michael U - MCP Network Administrator