On Fri, Jun 11, 2004 at 10:04:38PM -0400, Greg A. Woods wrote:
> If you reject at RCPT time based on your dislike of the HELO parameter
> then you're only confusing the sender, at best. You're saying at the
> protocol level that you don't like that recipient address then nine
> times out of ten you're going to end up making the sending user think
> they mis-typed the address or that their friend no longer has a mailbox
> at your domain.
Connect from a roadrunner cablemodem to your MX
EHLO yahoo.com
What do you get then?
> I.e. leaving the 5xx to RCPT time instead of sending it at HELO time
> when you should is just plain stupid and violates the _intent_ of the
5xx'ing anywhere other than rcpt to has the unfortunate effect of having a
bunch of broken MTAs that'll treat it as a tempfail and hammer back the
message at you. Microsoft mailservers, virus smtp engines ...
Our error message returns a url like
http://spamblock.outblaze.com/[some-code] - that has a detailed explanation
for those who care to read it. Tends to minimize the confusion part of the
issue I guess.
--
linux@??? (Suresh Ramasubramanian)
jaharkes@ravel:/usr/src$ mv linux Gnu/Linux
mv: cannot move `linux' to `Gnu/Linux': No such file or directory
jaharkes @ cs.cmu.edu in reply to RMS on linux.kernel
