Greetings, Jim is quite right - though there are ways, Keshab, to address the message overload problem when a topic lights up on the PBS. I have a filter for my email inbox so that all the emails to the PBS list go into a separate folder. This means a busy topic like Lycoris doesn't fill my inbox and squeeze out my more important non-PBS messages. And I can just look in that folder when I want to check for PBS messages of interest. I also recommend you use the "group by conversation" or similar option for your email client. In my PBS emails folder, all 15+ Lycoris messages from the recent topic are grouped in a single entry in the list of messages. My old email system just listed each email in order or receipt (newest first) and that meant a topic like Lycoris with many responses would quickly fill the first page of the list. "Conversation" grouping really helps that problem. -|<ipp > From: email@example.com > In my own opinion, that pretty much would defeat the purpose of the PBS > list. > > On Thu, Jul 31, 2014 at 12:46 PM, Keshab C. Pradhan <firstname.lastname@example.org> > wrote: > > Wonder if specific topics like *Lycoris squamigera* could be exchanged only > > among those genuinely interested in once the topic has been opened in PBS > > site?