Messages in this thread |  | | Date | Fri, 7 Sep 2001 09:52:38 +0100 (BST) | From | Matthew Kirkwood <> | Subject | Re: notion of a local address [was: Re: ioctl SIOCGIFNETMASK: ip alias |
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On Thu, 6 Sep 2001, Wietse Venema wrote:
> 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.
Would it not suffice, in the common case, to check if the local address that the SMTP connection was accepted on is the same as the IP address in the email address?
As I see it, it breaks only for multihomed relays or weird configurations, (with values of "breaks" close to "incurs an extra SMTP transaction").
You could even maintain a cache of IPs that SMTP connections had been accepted on.
Matthew.
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