On 21.06.2014 20:57, Kaz Kylheku wrote:
I'm guessing:
H=X [Z] -- host gave no HELO; X is a reverse lookup from Z.
H=(X) [Z] -- X was given as HELO; but matches Z
H=X ([Y]) [Z] -- X was reversed from Z; host gave Y numeric IP as
HELO
H=X (Y) [Z] -- X was reversed from Z; host gave Y non-numeric item as
HELO
No, I think that's not it. Rather:
- unparenthesized token: looked-up host name.
- parenthesized token: HELO string (with brackets if IP).
- bracketed token: connecting IP.
The third one is always present; either of the preceding two may be
absent, but they are always in this order.
The looked-up host name is missing if the IP doesn't reverse-resolve.
The parenthesized token is absent if there was no HELO (or empty?)
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