[ietf-dkim] 1193 considered harmful

[Dave Crocker]

>>> Most mailing lists that I know of produce one copy of the outgoing
>>> mail with a large number of rcpt-to's, so it's not very important
>>> to them. Where it might be useful is for, say, an outbound marketing
>>> campaign where you send the spam^H^H^H^Hmessage to each recepient
>>> individually.
>>
>> It is quite common for bulk mailing services to re-use the same body 
>> for multiple postings.
>>
>> It provides a basic level of per-user tailoring that is quite useful.
> 
> Isn't that what I just said?

No.  You said it might be.  I said it was.  The difference is particularly 
significant with respect to:

> In any case, I wonder how useful it really is because lots of bulk
> mailers try to customize their message to the recipient. This seems
> like a pretty marginal optimization to me.

because this observation is the usual comment at this stage of a discussion 
about this topic, and the question is left at whether same-body/different-header 
messages are actually sent.  I am saying that they are.

This does not say that tailored bodies are not also popular.  Merely that they 
are not the only model that is used.

d/
-- 

Dave Crocker
Brandenburg InternetWorking
<http://bbiw.net>