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qmail supports forwarding and mailing lists:
Sendmail .forward compatibility. Using the dot-forward package, Sendmail-style .forward files can be used.
Hashed forwarding databases. The fastforward package implements a high-performance forwarding database.
Sendmail /etc/aliases compatibility. The fastforward package includes a clone of the newaliases command that supports Sendmail-style alias databases.
Address wildcards. Using .qmail-default, .qmail-something-default, and so on, users and mail administrators can specify the disposition of messages to multiple addresses.
Mailing-list owners. If a message is forwarded to .qmail-something, and .qmail-something-owner exists, it automatically gets a return address of user-something-owner@domain. This diverts bounces and vacation messages from going to the sender.
Variable Envelope Return Path (VERP) support. VERP allows reliable automatic recipient identification for mailing-list bounces.
Delivered-To header field. Each "final" delivery causes the addition of a Delivered-To header field containing the recipient address. If a message already contains a Delivered-To for the current recipient, the message is rejected. This enables automatic loop prevention, even across hosts.
Automatic subscription management. The ezmlm package allows users to subscribe and unsubscribe themselves from mailing lists. It also tracks bounces and removes invalid addresses.
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