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Re: Maybe simple question

2003-12-13 19:55:21
On Sat, Dec 13, 2003 at 09:21:09PM -0500, Edward Ned Harvey wrote:
Second, let me make this assumption -- If joe(_at_)joe(_dot_)com sends a 
message to
mary(_at_)mary(_dot_)com, then it should say it's from 
joe(_at_)joe(_dot_)com(_dot_)  In other words, I
am saying that relays should not change the email address of the sender.  If
relays were to change the sender's address, then Mary will have no idea who
sent it, because the path from joe to mary is not guaranteed.  Especially if
they travel.


With SPF, the path for person-to-person mail would need to be guaranteed.  Mail
from joe.com will have to come from a servers that is allowed to send mail to
"the world" from joe.com.  How Joe gets mail to one of those servers, while
travelling or not, is irrelevant to the final recipient.

Or, of course, the DNS admin for joe.com can say that mail from joe.com can
come from anywhere (or just not publish an SPF record).  Which will work until
this reaches critical enough mass that receivers will stop accepting mail from
non-existent or ridiculously broad SPF senders. 

The tools to do this exist widely.  If the only problem is that Joe or his
IT staff can't figure out how to use SMTP AUTH (or are simply unwilling to
change their behaviour), well, too bad, IMO.  

-- 
Alan

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