Alan Cox:
> How for example do you propose to answer the question for the case
> Q: "is this local" A: "it depends on the sender"
> With netfilter and transparent proxying active this is entirely possible
Please explain the relevance for a real-world, SMTP based, MTA.
If an MTA receives a delivery request for user@[ip.address] then
the MTA has to decide if it is the final destination. This is
required by the SMTP RFC.
In order to enable SMTP RFC compliance, Linux has to provide the
MTA with the necessary information. Requiring the sysadmin to
enumerate all IP addresses in a file, as suggested by some other
poster, is impractical.
If an MTA receives a mail relaying request for user@domain.name
then it would be very useful if Linux could provide the MTA with
the necessary information to distinguish between local subnetworks
and the rest of the world. Requiring the local sysadmin to enumerate
all local subnetwork blocks by hand is not practical.
I will ignore denigrating comments about competing IP stacks.
Wietse
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This archive was generated by hypermail 2b29 : Fri Sep 07 2001 - 21:00:36 EST