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.
|Tags||Communications Email Filters Mail Transport Agents|
|Operating Systems||POSIX Linux|
Release Notes: This release adds a method to soft-reset sent mails per IP accounting. Also, limits on "peruser_limit" and "whitelist" configuration files now unban the affected IPs, so there's no need to restart DynamicRelay at all.
Release Notes: This release adds per-user limits to the number of email messages to send, auto-detection of maillog file rotation, and whitelisting of IP addresses.
Release Notes: This release fixes an error in the email notifications about abuses of service. Support for the Qpopper POP server was added.
Release Notes: This release adds support for the wu-imapd, dovecot, and courier IMAP/POP servers, support for Postfix and Sendmail, and email notifications for abuse of service (from your customers).
Release Notes: A possible relay bypass was fixed. Spammers now get a customizable message warning them about their actions when they try to send more messages than allowed. This release works with pop3d as well as imapd logins. When an IP is considered to be spammer, it gets logged only once per day, and if running in verbose mode, it's shown only once a day until the counters are reset (next day). Some comments have been added to the code. The logic was reordered so that the algorithm is now more consistent.