The mailing list for listmasters using Sympa

[Adam Bernstein <address@concealed>]

David Verdin wrote:
> Could you please send us an example of such a message (the one that 
> causes the loop)?
> We will see what make it miss the test.

I could, but it's very simple:  Send a message with the command "lists" or 
"help" in the subject line to sympa@.  Repeat as many times as you like in 
as short a period as you like, and regardless of your loop prevention 
settings, it will keep sending back responses.  Do you still want me to 
send an example message?

     ab

> Adam Bernstein a écrit :
> > Howdy Sympa folks.  We've increasingly had problems with infinite mail 
> > loops getting started between our server and another (the other server 
> > is often also a listserver, maybe even a Sympa server) via commands 
> > like "lists" and "help".  Although we have Sympa's loop detection 
> > turned on and set to a low threshhold (10 commands in 1 hour) and it 
> > does catch and stop some loops, it does not catch these.  I take it 
> > that's because of the line in sympa.pl that counts and blocks 
> > responses only if there is a "report", which must mean something other 
> > than "any response", since these commands are obviously generating 
> > responses but are not getting counted.
> >
> > The conditional line in 5.3.3 is:
> >
> >     if (&report::is_there_any_report_cmd()) {
> >
> > We need to expand the loop prevention to cover all commands, so I'm 
> > wondering, can we just take that condition out?  Or else how to modify 
> > it?
> >
> > Many thanks.
> >
> >      ab