Re: [Exim] Yahoo DomainKeys...

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著者: McKeever Chris
日付:  
To: exim-users, Andre Grueneberg
題目: Re: [Exim] Yahoo DomainKeys...

On Wed, 19 May 2004 03:27 , Andre Grueneberg <andre@???> sent:

>--
>Andreas Steinmetz wrote:
>> > http://antispam.yahoo.com/domainkeys
>> Sorry, but my point of view is that this system is utter bullshit.
>
>I have to second this, but for other reasons.



I may not have fuly understood this article - but does this mean that an mail client that _needs_ to send outbound mail via thier HOME ISP will
not be able to send email from thier work account (such as using outlook and putting thier FROM as thier work address and using thier ISP mail
server)???



>
>> 1. There already exist solutions which require less processing power
>>    (think of high throughput MTAs) and are proven to work, e.g.
>>    SPF , see spf.pobox.com (Greg? )

>
>At least they don't tell the fairy tale of spammers with limited
>ressources, do they? These people have access to big clusters (AKA worm
>infected systems).
>
>> 2. What I really laugh at is the 'that the message was not tampered
>>    with' part. And who the f..k asserts that the message wasn't
>>    tampered with between sending MUA and MTA (evil grin)?

>
>I think they'll tell you, that SMTP AUTH exists and the connection
>between MUA and MTA is considered save. As far as I understood the
>system, domainkeys only works between MTAs.
>
>> 3. If you wan't to sign a message there's well known and better
>>    solutions like PGP/GnuPG that just don't fit a certain company's web
>>    mail service.

>
>Adding the signature at the MUA would require the private key to be
>available to the end system -- you remember those systems offering
>remote access to spammers. Thus making the whole system vulnerable.
>
>But the biggest point: like SPF, domainkeys makes using other relays
>impossible. This is just what these big web mail companies want their
>customers to do. If you don't buy SMTP access for $MONEY, you'll have to
>use our web interface -- even for sending mail with that address. I
>don't know, who's developing those "anti-spam" systems, technicians or
>managers, but I tend to the last. ;)
>
>Andre
>--
>Im a doctor, not a magician! -- Bones McCoy
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