[dokuwiki] Installing Dokuwiki without mail service

Good morning,
I am setting up a test server to play with Dokuwiki. The intent is to use it to learn PHP while trying some plug-ins and other features that I can't play with on the live server at work, and possibly set up a family wiki for my children and grandchildren to access via VPN. This server is on a private network inside my firewalls.
The install script is complaining that PHP 'mail' is not working. There was some discussion on this in the mailing list about two years ago, but the conclusion seems to be that there must be a mail service available. I have not installed an MTA on this server, nor do I see any need to do so since RSS already provides me all of the update information I want. So I have two questions.
1. Is there an easy way to change that error into a warning and let the installation proceed? It is not necessary to disable all mail options automatically, but that would be a nice side effect.
2. Is there a simple method to redirect the mail generated into a local log file for debugging or /dev/null when not? 

My server configuration is as follows:

 Dell PowerEdge 2200 (P-II/300MHz)
 Slackware 10.2
 Apache 1.3.37
 PHP 4.4.5
 Dokuwiki current 2/27/07
As a side question, is the Atom feed still at version 0.3, or has that been upgraded to 1.0 now? If it is still 0.3, what is needed to update it? 

Thank you,

Bob McConnell
N2SPP
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