On Thursday 19 January 2006 13:55, Tony Finch wrote:
> On Thu, 19 Jan 2006, Chris Knadle wrote:
> >     Well, I just became a backup MX for an admin that is using Postfix
> > that is making extensive use of these addresses with wildcards after the
> > local_part.
>
> Do you mean something like local_part_suffix?

   Unfortunately I'm not sure what you mean, either.  ;-)

   An example entry I would look to do would be:
        [EMAIL PROTECTED]
   Which would match all of the following:
        [EMAIL PROTECTED]
        [EMAIL PROTECTED]
   etc.

> Alternatively, you could just not bother to maintain a copy of the
> userlist and use recipient callout verification instead.

   Yes, I did think of that, and it is a good suggestion.  I haven't suggested 
that to the other admin yet, as I'm trying to avoid doing that as it 
generates more traffic and this admin is on a somewhat slow static DSL line.  
Also, I've had several requests in the past for this type of wildcards for 
particular users of my own anyway, so I decided to work on the problem 
regardless and try to come down to a "yay or nay" as to whether it is 
possible with Exim4 or not before falling back to alternatives.
   Callout verification is the best fallback strategy, so once I find out that 
it's too difficult to do with Exim4 I can offer that as a "take it or leave 
it".

   Another thing I thought of was breaking out into a script to do the lookup 
in bash or perl, but I just don't like the idea of having to do that and 
again wanted to find out if there was a way to do it directly in Exim4 first.

   Then I considered doing email routing with ldap, but that has a similar 
problem because the time in which wildcards can be used is in the address 
used for the lookup and not a wildcard in an address that's stored in the 
directory.  [At least that's my current understanding after doing some 
experiments.]

   So -- that's what brings me here.  ;-)

        - Chris

-- 

Chris Knadle
[EMAIL PROTECTED]

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