[Mimedefang] Greylisting and Primus

[netguy]

Todd Aiken wrote:

>Just wondering if anybody else on this list has had problems with
>Greylisting and people being unable to mail them from the Primus ISP?
>I've had a couple of users having mail bouncing trying to mail our
>domain, and I've traced it to the fact that Primus seems to treat 400
>series SMTP error codes as permanent failures and they don't seem to
>  
>
Same problem with MontanaSky, Kootnet and KVIS.  They think that they 
are running just fine.  Don't care if customer eMail is not getting 
thru.  Of course, thier networks go down quite regular so I suspect that 
it really doesn't matter to them anyway.