Postoffice is a simple SMTP mail server and client written with spam blocking in mind. It provides a greylist to slow down the rate of incoming spam, and can be configured to do antivirus checking on incoming mail either via the sendmail milter protocol or a traditional hard-coded AV program. Postoffice can be configured to deliver mail to accounts inside vm-pop3d-style virtual domains, and it can further be enabled to support AUTH LOGIN for people inside virtual domains, so they can use postoffice as a mail forwarder when replying to mail. Postoffice accepts (and ignores) many of the same command line options that are passed to sendmail, and it comes with the usual crop of sendmail compatable aliases; runq, mailq, newaliases, and sendmail. License: BSD License (original) Changes: A bug where spam=bounce doesn't actually set spam=bounce was fixed. The code was cleaned up to reduce the complaints from "gcc -Wall".

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