E-Mail to Specific Domain Not Working

Hello,

I am having a problem sending e-mail to one specific domain. All of my e-mail goes out just fine except for this one domain. I can receive e-mails just fine, but sending bounces back.

The strange thing about the bounce backs is that the e-mail doesn't indicate any error that I would normally recognize - such as bad gateway, SPAM rejection, etc. The bounced e-mail does indicate that it is attempting the delivery 98-100 times.

My sending server is located in house, it is a Novell GroupWise Internet Agent, version 8.0.3.

If anyone has any ideas, or a push in the right direction of where to look for answers, that'd be great.

Thanks!!
jstonendAsked:
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Martin TarlinkNetwork Systems AdministratorCommented:
Hmmm, maybe call them because your domain could be blocked by theirs spam filter.
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Martin TarlinkNetwork Systems AdministratorCommented:
Do you have GWAVA,  GWIA working on your server?
Look there maybe that domain was added to black list.
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jstonendAuthor Commented:
No GWAVA, used to, but not anymore.
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Martin TarlinkNetwork Systems AdministratorCommented:
OK, go to Novell console and open GW logs, and send an email to that domain, and see what respond you will get.
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jstonendAuthor Commented:
The GWIA log shows 501 Syntax Error (must've missed that before) - but I'm not sure what could be causing the problem.
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Martin TarlinkNetwork Systems AdministratorCommented:
I have dropped GW last year and I moved to Google email :) but remember GWIA was a pain sometimes.
Look on Novell forum for that error, but first I will recommend look over GWIA spam list, it is probably sitting there as SPAM
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jstonendAuthor Commented:
So the log is showing: Send Failure: 501 Syntax

The thing is that e-mailing this domain worked fine up until about 6 weeks ago when it suddenly stopped working.

Every time I google this problem, it thinks I'm talking about receiving e-mail, but I can receive from this domain without a problem, its just sending.

I've turned on verbose logging and hopefully that can shed some light.
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