On Wed, 15 Jun 2005 torsten@??? wrote:
> What does sender_domain check? The envelope or the from: field?
Envelope. In theory, an MTA is concerned only with envelopes, just like
regular snail mail post handlers. (In practice these days, MTAs often
have to look inside to do various checks.)
> What is the relationship between the from: field and the envelope? What
> info gets filled in from where?
There is no relation. The creator of the message can fill in whatever
they want to, though a Message Submission Agent (MSA) may enforce
certain constraints.
> Pointers to the Exim spec will do, but I was unable to find this info myself.
http://www.exim.org/exim-html-4.50/doc/html/spec_43.html#SECT43.11
gives some information.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book: http://www.uit.co.uk/exim-book
