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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:46:30 +0000 |
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| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:46:30 +0000 |
| commit | b5896ba9f6047e7031e2bdee0622d543e11a6734 (patch) | |
| tree | fd7b460593a2fee1be579bec5697e6d887ea3421 /proto/MAILDROP_README.html | |
| parent | Initial commit. (diff) | |
| download | postfix-upstream.tar.xz postfix-upstream.zip | |
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'proto/MAILDROP_README.html')
| -rw-r--r-- | proto/MAILDROP_README.html | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/proto/MAILDROP_README.html b/proto/MAILDROP_README.html new file mode 100644 index 0000000..4657df3 --- /dev/null +++ b/proto/MAILDROP_README.html @@ -0,0 +1,195 @@ +<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" + "http://www.w3.org/TR/html4/loose.dtd"> + +<html> + +<head> + +<title>Postfix + Maildrop Howto</title> + +<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> + +</head> + +<body> + +<h1><img src="postfix-logo.jpg" width="203" height="98" ALT="">Postfix + Maildrop Howto</h1> + +<hr> + +<h2> Introduction </h2> + +<p> This document discusses various options to plug the maildrop +delivery agent into Postfix: </p> + +<ul> + +<li><a href="#direct">Direct delivery without the local delivery agent</a> + +<li><a href="#indirect">Indirect delivery via the local delivery agent</a> + +<li><a href="#credits">Credits</a> + +</ul> + +<h2><a name="direct">Direct delivery without the local delivery agent</a></h2> + +<p> Postfix can be configured to deliver mail directly to maildrop, +without using the local(8) delivery agent as an intermediate. This +means that you do not get local aliases(5) expansion or $HOME/.forward +file processing. You would typically do this for hosted domains with +recipients that don't have UNIX home directories. </p> + +<p> The following example shows how to use maildrop for some.domain +and for someother.domain. The example comes in two parts. </p> + +<p> Part 1 describes changes to the main.cf file: </p> + +<blockquote> +<pre> + 1 /etc/postfix/main.cf: + 2 maildrop_destination_recipient_limit = 1 + 3 virtual_mailbox_domains = some.domain someother.domain + 4 virtual_transport = maildrop + 5 virtual_mailbox_maps = hash:/etc/postfix/virtual_mailbox + 6 virtual_alias_maps = hash:/etc/postfix/virtual_alias + 7 + 8 /etc/postfix/virtual_mailbox: + 9 user1@some.domain <i>...text here does not matter...</i> +10 user2@some.domain <i>...text here does not matter...</i> +11 user3@someother.domain <i>...text here does not matter...</i> +12 +13 /etc/postfix/virtual_alias: +14 postmaster@some.domain postmaster +15 postmaster@someother.domain postmaster +</pre> +</blockquote> + +<ul> + +<li> <p> Line 2 is needed so that Postfix will provide one recipient +at a time to the maildrop delivery agent. </p> + +<li> <p> Line 3 informs Postfix that some.domain and someother.domain +are so-called virtual mailbox domains. +Instead of listing the names in main.cf you can also +list them in a file; see the virtual_mailbox_domains documentation for +details. </p> + +<li> <p> Line 4 specifies that mail for some.domain and someother.domain +should be delivered by the maildrop delivery agent. </p> + +<li> <p> Lines 5 and 8-11 specify what recipients the Postfix SMTP +server should receive mail for. This prevents the mail queue from +becoming clogged with undeliverable messages. Specify an empty +value ("virtual_mailbox_maps =") to disable this feature. </p> + +<li> <p> Lines 6 and 13-15 redirect mail for postmaster to the +local postmaster. RFC 821 requires that every domain has a postmaster +address. </p> + +</ul> + +<p> The vmail userid as used below is the user that maildrop should +run as. This would be the owner of the virtual mailboxes if they +all have the same owner. If maildrop is suid (see maildrop +documentation), then maildrop will change to the appropriate owner +to deliver the mail. </p> + +<p> Note: Do not use the postfix user as the maildrop user. </p> + +<p> Part 2 describes changes to the master.cf file: </p> + +<blockquote> +<pre> +/etc/postfix/master.cf: + maildrop unix - n n - - pipe + flags=ODRhu user=vmail argv=/path/to/maildrop -d ${recipient} +</pre> +</blockquote> + +<p> The pipe(8) manual page gives a detailed description of the +above command line arguments, and more. </p> + +<p> If you want to support user+extension@domain style addresses, +use the following instead: </p> + +<blockquote> +<pre> +/etc/postfix/master.cf: + maildrop unix - n n - - pipe + flags=ODRhu user=vmail argv=/path/to/maildrop + -d ${user}@${domain} ${extension} ${recipient} ${user} ${nexthop} +</pre> +</blockquote> + +<p> The mail is delivered to ${user}@${domain} (search key for +maildrop userdb lookup). The ${extension} and the other address +components are available to maildrop rules as $1, $2, $3, ... and +can be omitted from master.cf or ignored by maildrop when not +needed. </p> + +<p> With Postfix 2.4 and earlier, use ${nexthop} instead of ${domain}. +</p> + +<h2><a name="indirect">Indirect delivery via the local delivery agent</a></h2> + +<p> Postfix can be configured to deliver mail to maildrop via the +local delivery agent. This is slightly less efficient than the +"direct" approach discussed above, but gives you the convenience +of local aliases(5) expansion and $HOME/.forward file processing. +You would typically use this for domains that are listed in +mydestination and that have users with a UNIX system account. </p> + +<p> To configure maildrop delivery for all UNIX system accounts: </p> + +<blockquote> +<pre> +/etc/postfix/main.cf: + mailbox_command = /path/to/maildrop -d ${USER} +</pre> +</blockquote> + +<p> Note: ${USER} is spelled in upper case. </p> + +<p> To enable maildrop delivery for specific users only, you can +use the Postfix local(8) delivery agent's mailbox_command_maps feature: +</p> + +<blockquote> +<pre> +/etc/postfix/main.cf: + mailbox_command_maps = hash:/etc/postfix/mailbox_commands + +/etc/postfix/mailbox_commands: + you /path/to/maildrop -d ${USER} +</pre> +</blockquote> + +<p> Maildrop delivery for specific users is also possible by +invoking it from the user's $HOME/.forward file: </p> + +<blockquote> +<pre> +/home/you/.forward: + "|/path/to/maildrop -d ${USER}" +</pre> +</blockquote> + +<h2><a name="credits">Credits</a></h2> + +<ul> + +<li> The original text was kindly provided by Russell Mosemann. + +<li> Victor Duchovni provided tips for supporting user+foo@domain +addresses. + +<li> Tonni Earnshaw contributed text about delivery via the local(8) +delivery agent. + +</ul> + +</body> + +</html> |