RE: [Exim] smtp_accept_max_?? option

> Apart from disabling that users account (which does not stop them just
> creating another)

this has a non-exim solution:

1) validate credit card numbers before turning up dial in user accounts

2) add a moderate ($500-$2000) penalty to your TOS for dial customers
for spamming incidents. after they get caught a time or too, they'll
probably go elsewhere to spam.

cheers,
richard