On 15 Jan 2001 michael@??? wrote:
> > server_condition = ${if \
> > eq{$3}{${lookup{$2}lsearch{/etc/exim/passwd}}}{1}{0}}
If the contents of $3 match the data that was looked up, authentication
succeeds. If the lookup fails, the data looked up is empty - that will
match an empty value of $3.
> > server_condition = ${if \
> > eq{$3}{${lookup{$2}lsearch{/etc/exim/passwd}{$value}fail}}{1}{0}}
In this case, if the lookup fails, authentication is always refused.
> AFAIK, there are three exits to "${if ...}": true, false and defer.
> If the lookup returned no data, you enforce a failure. If that was
> within a router, it would defer the message.
Not necessarily. Some routers decline and pass the address to the next
message. Defering usually happens if the lookup cannot complete (e.g. a
database is offline) so that it neither succeeds nor fails.
> With authentication, you
> get a temporary error.
Yes.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
