On Thursday 04 January 2001 15:00, you wrote:

This is the last one, I sweare

> If the SMTP server can't look up the client hostname, AND if the
> client IP address is not predictable

I think the situation is like that, because:
SMTP server can know the address of a specified trusted host, BUT when the
client do SMTP connection (theres postfix on the client side) it sends only
his ip address.
Then (I think) SMTPD tries to reverse lookup the name and
nslookup ip-address give something like 213-167-206-86.flat.galactica.it
which obviously don't match with my dynamic-dns. Since this users are dial-up
users they change very often their ip (and then their reverse lookup names).

> then use pop-before-smtp
> or SMTP AUTH (see SASL_README).

I tried pop-before-smtp and it works. *but* what if an address get validated
and added to the database, and after another dial-up user (that I don't know)
connect whith the same ip? (it's a remote possibility, but I'm curious).
Maybe every trusted address has an (how long is?) expire time?

Thanks again for your help. Have a good day.

        gianpaolo racca
        gianpaolopreciso.net

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