Renaming a Groupwise Server

I think I need to rename our mail server.  School district with one Groupwise 7 mail server in a Netware 6.5 network.  We started getting messages returned from one of the local Internet providers here.  Following is the return explanation...
>After working with tech about returned mail from our server, this is what he says we need to do.... Also I have pasted a couple of warnings from the DNSReport at the bottom of this email.  It looks as if these warnings are related to the Frontier server problem with our server.
>  Thank you for contacting Frontier Internet Technical Support. I am
>very sorry to hear that your e-mail is being rejected by
> The error message that you are seeing indicates that
>your e-mail server is not sending an appropriate HELO greeting to our
>server. You will need to speak with your mail administrator to have
>this issue resolved. Here is the error definition from
>Unknown or improperly formatted hostnames in helo (SMTP conversation)
>Error Message: 554 <FrontierNet MTA na
>me>: Helo command rejected: Host
>not found.
>Error Message: 504 <FrontierNet MTA name>: Helo command rejected: need
>fully-qualified hostname.
>Solution: Your mail server needs to be reconfigured to send a proper
>helo greeting.
>WARNING: One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record.
> claims to be non-existent host
>220 GroupWise Internet Agent 7.0.1 Copyright (c) 1993-2006 Novell, Inc. All rights reserved. Ready
The name of our server is IS1 but we have the DNS entry as MAIL and not IS1.  
Can I just change the name of the server from IS1 to MAIL and if so, how do I do that.  I have read that changing a name of a Netware server can be a challenge.
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If you change the name *and* the IP address at the same time, that can be quite messy. Changing one at a time and giving the change time to propogate is not especially difficult.

However, it may not be necessary to change the name of the server in eDirectory or the OS in order to achieve the goal of having the HELO issued by GWIA match the DNS entry.

Easiest thing to do is update DNS. Why bother changing the server's name when the real issue is what gets returned by DNS when some receiving mailserver tries to resolve your server's name? You can maintain an alias using the old name and you won't break anything.

If you don't have an SPF record for your Zone, then adding one for the GWIA's IP address may be helpful.

I'm also thinking that there's a setting in GWIA where you can tell it what hostname to use when it says HELO. I'll have to research that some.

But changing the eDirectory and server name of the underlying NetWare server is about the *most* difficult approach I can see to resolving this issue.
krusebrAuthor Commented:
Thanks.  I will check for the SPF record but not sure where to start.
To learn more about SPF -->
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I'm suggesting 3 things, not one:

1) Change DNS so the reverse-lookup point to the "correct" host name.

2) Optionally, add an SPF record for your Zone

3) Alternatively, if we can track down the setting, change how GWIA does its HELO

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krusebrAuthor Commented:
Thanks.  I think I have it all fixed except for the SPF record.
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