Greylisting -- Was: Anti Spam

[Sam Lawrance]

On 28/04/2007, at 7:25 PM, Ted Mittelstaedt wrote:

>
>
>> -----Original Message-----
>> From: Bart Silverstrim [mailto:bsilver at chrononomicon.com]
>> Sent: Friday, April 27, 2007 1:58 PM
>> To: Ted Mittelstaedt
>> Cc: Christopher Hilton; Grant Peel; Eric Crist;
>> freebsd-questions at freebsd.org
>> Subject: Re: Greylisting -- Was: Anti Spam
>>
>>
>>
>> On Apr 26, 2007, at 12:15 AM, Ted Mittelstaedt wrote:
>>
>>> There are legitimate technical reasons that someone may want their
>>> mail
>>> to not be greylisted.  For example, my cell phone's e-mail  
>>> address is
>>> in our monitoring scripts to page me in the event of a server  
>>> failure.
>>> I would be pretty pissed off if Sprint suddenly started
>>> greylisting.  It
>>> isn't just dumb-ass users making stupid political decisions to  
>>> reject
>>> it, although in your case it probably was.
>>
>> If it is a legitimate mail server, it would be promoted to the auto-
>> whitelist.  Not all mail is constantly greylisted by most intelligent
>> greylist systems.  Only the first few messages would be delayed,
>> until it is established as legitimate.
>>
>
> That won't work in my case since I generally only have a failure  
> that causes
> a problem which results in paging about once every 3 months or so.   
> By the
>  time the pages got through the
> greylist it would be at least an hour later after the system had gone
> down.  That isn't acceptable for a notification system.

Email is not an instant messaging system, no matter how much you want  
it to be one.