newbie: looking for pine like expunge feature

[Federico Grau]

Hi folks, 

I believe I have finally made my conversion to mutt (from pine)
for good.  I am still working out some details but I am sure 
with time they will be squashed.

For now, I am looking for a pine like "expunge" feature, where I can 
really delete emails from my mailbox without having to first leave
it.  I tried searching the FAQ and teh Manual but could not 
find anything with "expunge|purge|compress".

help would be apreciated.

thanks,
donfede