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The SMTP courier, which handles outgoing connections, uses the domain of the envelope's from as the domain in the HELO/EHLO greeting. This works fine in practice, but ideally the domain used in the greeting should match the reverse DNS record. This used to be more relevant but nowadays it is not really enforced; however, it sometimes comes up in self checks, and might cause some confusion when troubleshooting. So this patch makes it use the configured hostname instead, which is under the users' control and more likely to be compliant. It also simplifies the code. The documentation of the hostname configuration option is also updated to mention this behaviour. Thanks to Jonas Seydel (thor77) for bringing this up.
120 lines
3.7 KiB
Plaintext
120 lines
3.7 KiB
Plaintext
=head1 NAME
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chasquid.conf(5) -- chasquid configuration file
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=head1 SYNOPSIS
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chasquid.conf(5) is chasquid(1)'s main configuration file.
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=head1 DESCRIPTION
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The file is in protocol buffers' text format.
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Comments start with C<#>. Empty lines are allowed. Values are of the form
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C<key: value>. Values can be strings (quoted), integers, or booleans (C<true> or
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C<false>).
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Some values might be repeated, for example the listening addresses.
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=head1 OPTIONS
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=over 8
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=item B<hostname> (string):
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Default hostname to use when saying hello. This is used to say hello to
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clients (for aesthetic purposes), and as the HELO/EHLO domain on outgoing SMTP
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connections (so ideally it would resolve back to the server, but it isn't a
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big deal if it doesn't). Default: the system's hostname.
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=item B<max_data_size_mb> (int):
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Maximum email size, in megabytes. Default: 50.
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=item B<smtp_address> (repeated string):
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Addresses to listen on for SMTP (usually port 25). Default: "systemd", which
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means systemd passes sockets to us. systemd sockets must be named with
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B<FileDescriptorName=smtp>.
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=item B<submission_address> (repeated string):
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Addresses to listen on for submission (usually port 587). Default: "systemd",
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which means systemd passes sockets to us. systemd sockets must be named with
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B<FileDescriptorName=submission>.
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=item B<submission_over_tls_address> (repeated string):
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Addresses to listen on for submission-over-TLS (usually port 465). Default:
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"systemd", which means systemd passes sockets to us. systemd sockets must be
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named with B<FileDescriptorName=submission_tls>.
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=item B<monitoring_address> (string):
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Address for the monitoring HTTP server. Do NOT expose this to the public
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internet. Default: no monitoring server.
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=item B<mail_delivery_agent_bin> (string):
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Mail delivery agent (MDA, also known as LDA) to use. This should point
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to the binary to use to deliver email to local users. The content of the
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email will be passed via stdin. If it exits unsuccessfully, we assume
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the mail was not delivered. Default: F<maildrop>.
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=item B<mail_delivery_agent_args> (repeated string):
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Command line arguments for the mail delivery agent. One per argument.
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Some replacements will be done.
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On an email sent from marsnik@mars to venera@venus:
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%from% -> from address (marsnik@mars)
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%from_user% -> from user (marsnik)
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%from_domain% -> from domain (mars)
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%to% -> to address (venera@venus)
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%to_user% -> to user (venera)
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%to_domain% -> to domain (venus)
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Default: C<"-f", "%from%", "-d", "%to_user%"> (adequate for procmail and
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maildrop).
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=item B<data_dir> (string):
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Directory where we store our persistent data. Default:
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F</var/lib/chasquid>.
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=item B<suffix_separators> (string):
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Suffix separator, to perform suffix removal of local users. For
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example, if you set this to C<-+>, email to local user C<user-blah> and
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C<user+blah> will be delivered to C<user>. Including C<+> is strongly
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encouraged, as it is assumed for email forwarding. Default: C<+>.
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=item B<drop_characters> (string):
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Characters to drop from the user part on local emails. For example, if
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you set this to C<._>, email to local user C<u.se_r> will be delivered to
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C<user>. Default: C<.>.
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=item B<mail_log_path> (string):
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Path where to write the mail log to. If C<< <syslog> >>, log using the
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syslog (at C<MAIL|INFO> priority). Default: C<< <syslog> >>.
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=item B<dovecot_auth> (bool):
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Enable dovecot authentication. If true, users that are not found in chasquid's
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databases will be authenticated via dovecot. Default: C<false>.
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The path to dovecot's auth sockets is autodetected, but can be manually
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overridden using the C<dovecot_userdb_path> and C<dovecot_client_path> if
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needed.
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=back
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=head1 SEE ALSO
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chasquid(1)
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