DynamicRelay prevents your customers from sending
spam, and authenticates users using POP or IMAP to
send email in a pop-before-smtp fashion. You can
use it with the wu-imap, dovecot, Courier, and
Qpopper IMAP/POP servers, and with Postfix or
Sendmail. You set the limit to the number of email
messages a user can send per day. This is useful
when you have users infected by viruses that send
thousands and thousands of spam messages, or who
send spam deliberately. You can also control how
long users are allowed to send email after their
last POP or IMAP authentication. Abuses are logged
and emailed to you, and you can put your own
static entries in the access file.
