Developers of Sympa

[Jeff Abbott <address@concealed>]

Sympa devs,

We're looking at doing different things with Sympa now that we've  
begun its deployment here at Duke, and one of those things is for  
contact addresses to which our various servers can send mail for  
stuff like alerts, cron jobs, etc.  The problem is, a great many of  
those messages come from addresses which trigger the following  
conditional in sympa.pl:

    if ($sender =~ /^(mailer-daemon|sympa|listserv|mailman|majordomo| 
smartlist|$conf_email)(\@|$)/mio) {
        do_log('notice','Ignoring message which would cause a loop,  
sent by %s', $sender);
        return undef;
    }

What types of loops is this trying to prevent?  There are lots of  
valid messages which may come from address@concealed that  
list owners, and in our case list members, may wish to see, unless  
I'm misunderstanding the purpose or potential failings which not  
having this in-place would cause.  Is there a reason we couldn't make  
this a per-list configuration option?  I can understand not looping  
based on the X-Loop header, but what good does blocking anything from  
mailer-daemon do?

Thanks,
Jeff

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