> Usually, if unsubscribe to a list doesn't work it's because 
> one's trying to unsubscribe from a different address than the 
> one used to subscribe.
> 
> For more info, send a message to dev-help@cocoon.apache.org - 
> that includes a command to unsubscribe a different address 
> than the sender's.

Indeed: try 

'dev-unsubscribe-XXXXXX@cocoon.apache.org'

Where XXXXXX = the email you want to unsubscribe, with the '@' replaced
by '='

You still need to reply the confirmation

ard

> 
> -Bertrand
>