The mailing list for listmasters using Sympa

[Senandung Mendonan<address@concealed>]

Dear list,

I have a special requirement in my environment. Before sending mail to a 
mailing list in sympa, the sender can opt to _exclude_ certain members from 
receiving the mail, by sticking the following string in the header:-

X-Sympa-Exclusions: address@concealed

with address@concealed being the person being excluded. More persons 
can be listed by adding more X-Sympa-Exclusions headers.

Currently, as a short-term solution, I created server side filters on the 
local delivery end of each recipient (e.g. Cyrus's sieve, procmail, or 
maildrop's mailfilter, depending on mail back end used) to drop any mails 
with such header matching the recipient's email address.

I'm looking for a real solution: to let sympa do the filtering upon expansion 
of the list. Anybody done something close to this? Where is the best place to 
hack the filters in? Or can this be done in the configs?

Thanks in advance. :)

--mendonan