[fetchmail-users] Fetchmail error "requires envelope option"

[Anne W. <can...@go...>]

This is the third attempt to get this message through - I presume that the 
spam filter was blocking it, so I've removed the exclamation mark.

I'm now fetching my husband's mail, as well as my own (using fetchmail with 
cron, running as david), but I'm getting:

fetchmail: warning: multidrop for pop3.mailbox.co.uk requires envelope option!
fetchmail: warning: Do not ask for support if all mail goes to postmaster!

This never happens when I collect my mail (fetchmail with cron, running as 
anne).  Googling hasn't come up with anything useful.  What is this about?  
Thanks

Anne