According to the information supplied at  '

Task Wizard: Configure automatic deletion of invalid e-mail addresses

on clicking the ? (question mark) it says towards the bottom of the page


"Note that if you have coded "Delay(0)" and/or "Max(0)", LISTSERV simply 
deletes any error-generating subscriber it can (generally 95-98%), discards 
any further errors it does not understand, and does not generate daily 
monitoring reports. "

I have a 16,015 list that is set as:-

Auto-Delete= Yes,Full-Auto,Delay(0)

Two emails have been sent.  Postmaster (errors-to) has received hundreds 
of  '550 user unknown', but not a single person has been removed from the 
list.  It is still at 16,015.

???

Regards...Martin