John Jetmore wrote on Fri, 23 Apr 2010 13:39:29 -0400.
> $ exim -be '${if
> match{olga.hinterlands.org}{\N^.*[a].?[d].?[s].?[l]*\N}{your config is
> broken}{}}'
> You've misunderstood your regexp. Here's a quick explanation:
>
> [a] matches any character in the set of (a).
> . matches exactly one of any character (+/- some fiddly stuff with line endings)
> ? is a modifier which means "zero or one of the previous item"
> * is a modifier which means "zero or more of the previous item"
>
> the match is on "ands":
> "a" matches [a]
> "n" matches .?
> "d" matches [d]
> "" matches .?
> "s" matches [s]
> "" matches [l]*
Thank you for clearly explaining my misunderstanding.
Your helpful explanation is very useful. Now I know why the gaps between
the criteria letters (adsl) was not being processed in the way I had
expected. I have changed my test to:
deny message = [C06.5] Msg6 Msg2
hosts =
^.*[a](1)[-_.](.?)[d](1)[-_.](.?)[s](1)[-_.](.?)[l](1).*
^ = beginning of string
.* = any quantity, or none, of any characters
[a](1) = match only one 'a'
[-_.](?) = match next character which should be one or nil occurrences
of .-_
[d](1) = match only one 'd'
[-_.](?) = match next character which should be one or nil .-_
[s](1) = match only one 's'
[-_.](?) = match next character which should be one or nil .-_
[l](1) = match only one 'l'
[-_.](?) = match next character which should be one or nil .-_
.* = any quantity, or none, of any characters
You are obviously a good technical programmer.
Thank you again.
Paul.
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