gianpaolo racca:
> Hi, I have only one public ip address and one domain associated with it.
> I run a dns. With dynamic updates some hosts send me their address and after
> a few they are reachable at name.my.domain
> My question:
> How do I set postfix to do mail relay for those hosts? I can't do reverse
> lookups on the names, and I read on documentation that relaying based only on
> sender address it's not good.
> Can I do it or not?

If the SMTP server can't look up the client hostname, AND if the
client IP address is not predictable, then use pop-before-smtp
or SMTP AUTH (see SASL_README).

        Wietse

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