The mailing list for listmasters using Sympa

[karrageorgiou giannis <address@concealed>]

dear sympa community, 

in lists where sending is open to subscribers and moderated for
external people (what appears as "privateoreditorkey" in 
list available options), the external sender, after post is sent 
a mail informing him that his message will be considered.

can this mail be suppressed? (since in many times the external 
sender is just a spammer)

thanks for any tip