Gmane rewrite my letter. I changed back.
I just thinking about publishing subaddress separator symbol.
Maybe "... -all sep:-" can express that the domain uses subaddressing
so the source of the emails from 'local-ext1 AT domain' and
'local-ext2 AT domain' is the same and the source
can be described as 'local AT domain'. (Which is
not necessary a valid email address.)
Wechsler wrote:
"all" is logically the last mechanism. Only modifiers should logically
go after it.
"sep" as you describe it is a non-standard mechanism (and it should be a
modifier, not a mechanism) which modifies the meaning of the entire rest
of the spf record. I consider this unwise, as it will almost globally be
ignored.
Ignoring "sep" by today SPF parsers is a good news for me.
I mean "sep" just give additional information about the domain
addressing policy. "If you see an email from us you can identified the
source of the email by deleting some characters from the sender
address." It is not related to the transport path but it is related to
the domain (addressing policy).
In fact it appears to me that the same task can already be acheived
using macro expansion. If you want to specify "The part of localpart
before the first -", use %{l1-}
I would like to find a method for publishing that a domain uses TMDA,
VERP, etc like subaddressing. Macros does not express it.
z2
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