If you know the mail server IP or DNS name (i.e. mail.domain.com), from your IMail 
server can you telnet to it on port 25 and does it answer.  I would also try to 
tracert (from your IMail Server) to it and see if your requests make it to that mail 
server.  
 
Keith

        -----Original Message----- 
        From: Brian Cunningham [mailto:[EMAIL PROTECTED]] 
        Sent: Wed 11/27/2002 5:54 PM 
        To: [EMAIL PROTECTED] 
        Cc: 
        Subject: [IMail Forum] Undeliverable to One Domain
        
        

        We have a user who discovered that he, and we, can't send email to one
        particular domain.
        
        All messages come back as undeliverable due to unknown users.  Moreover,
        the header always comes back as the postmaster from our domain not the
        domain in question.
        
        We've checked to see if there is an issue with us having a host alias
        set up as the domain in question, we've been through our dns to check to
        see if there are problems there, and we've even checked the support at
        the domain itself to see if they're having problems on their end.
        
        Bottom line:  We can send email to the problem domain from anywhere else
        except our Imail system.  And it just seems to be this one domain that's
        the issue.
        
        Has anyone ever seen this issue?  If so, what was the solution (if any).
        
        Thanks.
        
        b
        
        -----Original Message-----
        From: Clay Larson [mailto:[EMAIL PROTECTED]]
        Sent: Wednesday, November 27, 2002 5:42 PM
        To: '[EMAIL PROTECTED]'
        Subject: RE: [IMail Forum] Alias Limitations???
        
        
        Sorry, a 255 character limit, not 256. I guess that includes the spaces
        in-between each name. Again, there is a separate field for each virtual
        domain, as in:
        HKEY_LOCAL_MACHINE\SOFTWARE\Ipswitch\IMail\Domains\$virtual003\Aliases
        and
        HKEY_LOCAL_MACHINE\SOFTWARE\Ipswitch\IMail\Domains\$virtual004\Aliases
        
        Here is the documentation quote (which I think you already read):
        
        "Host Aliases
        Specify alternate host names for which you want the host to accept mail.
        For example, if the mail host name is mail.domain2.com, you can set an
        alias of domain2.com so that IMail Server accepts mail addressed to
        [EMAIL PROTECTED] and also [EMAIL PROTECTED] Multiple aliases are
        separated by a space.  This field is limited to 255 characters."  
        
        my bad:
        >There is a 256 character limit for each virtual host's domain alias
        >field, which is stored in the registry.
        
        -----Original Message-----
        From: Bud [mailto:[EMAIL PROTECTED]]
        Sent: Wednesday, November 27, 2002 16:16
        To: [EMAIL PROTECTED]
        Subject: [IMail Forum] Alias Limitations???
        
        
        Hi all. Is there a limit to the number of aliases that can be under a
        single virtual host, or on the IMail server itself?
        --
        
        Bud Schneehagen - Tropical Web Creations
        
        _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
        ColdFusion Solutions / eCommerce Development [EMAIL PROTECTED]
        http://www.twcreations.com/ 954.721.3452
        
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