[Mailman-Users] subscription request as recieved, but nothing further happens (randomly)

[Geoff Deering]

Hi,

I have Mailman 2.16 installed on a server.  It seems to behaving 
erratically by only subscribing people randomly, some subscriptions are 
processed without problems.  I can't find what is happening with the 
failed attempts to subscribe.  It's acknowledging the subscription 
request as recieved, but there is no trace of it in the system and 
nothing further happens.

Any suggestions?

Regards
Geoff