I had a problem with Greylisting and GWIA. Some e-mails were failing to get through, with this error message:
16:32:52 3C4 DMN: MSG 728 Send Failure: 451 4.7.1 message delayed,
see http://www.greylisting.org ( http://www.greylisting.org/ ) ;
Please try again later
The solutions was to adjust the GWIA SMTP/MIME settings for the "Intervals to retry a deferred message". The default GWIA settings were:
I changed them to:
That fixed the problem.
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.