Developers of Sympa

[Chris Hastie <address@concealed>]

On Wed, 30 Nov 2005, Jeff Abbott <address@concealed> wrote
> > Also, keep in mind that this means Postfix will now make a separate 
> > SMTP
> > connection for each recipient, instead of batching them as determined 
> > by
> > Sympa's nrcpt parameter and Postfix's
> > default_destination_recipient_limit parameter.  So delivery takes 
> > longer
> > -- on our system, with nrcpt=25 and Postfix at its default, VERPed
> > delivery takes about 3 times longer than before.  This is significant
> > for lists of 10k or 50k subscribers (of which we have a few), but
> > overall it's quite acceptable.
>
> This would also be a problem for us, too, with some of our larger 
> lists.
>
> What would be ideal, and would be something I'd be willing to pitch  in 
> towards, is a "use_verp" per-list setting, with a site- or robot- level 
> default.

Another possibility that occurs to me is a sort of hybrid 'use VERP for 
every nth message'. You get the efficiencies of not using VERP for most 
messages, but every so often clean the list up with a VERP message. Of 
course, you can get most of the way here already by using periodic 
reminders with unique return addresses. The principle advantage would be 
that you wouldn't need a completely separate message to do the cleaning. 
Another issue I have with the reminder system, though, is its all or 
nothing approach. Bounce and your gone, irrespective of whether it's a 
one off or a pattern, a 4xx or a 5xx.
--
Chris Hastie