[ILUG] ILUG mail server now greylisting

[Kenn Humborg]

> Folks -
> 
> I've made a change to the configuration of the ILUG mail server (dagda) 
> in that it now implements greylisting.  Greylisting of incoming mail 
> basically means that, on the first attempt to send a mail to dagda, the 
> mail will be refused with a 450 (temporary error), but will be accepted 
> should it be resent after five minutes.  This actually traps quite a 
> lot of spam, as most spammers don't bother to resend email.
...
> The visible result will be that mail takes longer to reach the list, 
> probably about 15 minutes or so, depending on how other MTAs are 
> configured.

Does this apply to _all_ messages received by dagda, or only the first
message from a given host?

Later,
Kenn