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delivery-queue(8gx) Gromox admin reference delivery-queue(8gx)

Name

delivery-queue — LMTP/SMTP frontend for local delivery

Synopsis

delivery-queue [-c config]

Description

delivery-queue is an additional mail queue in front of delivery(8gx). It may be removed in a future version.

Options

Read configuration directives from the given file. If this option is not specified, /etc/gromox/smtp.cfg will be read if it exists.
-?
Display option summary.

All time-based command-line options and configuration file directives are subject to the syntax described in gromox(7), section "Duration specifications".

Configuration directives (gromox.cfg)

The following directives are recognized when reading from /etc/gromox/gromox.cfg, or when the -c option is used to specify a custom file:

In gromox-delivery-queue, this is treated as an alias for lda_fd_limit.
Request that the file descriptor table be at least this large. The magic value 0 indicates that the system default hard limit (rlim_max, cf. setrlimit(2)) should be used.
Default: 0

Configuration directives (smtp.cfg)

The following directives are recognized when reading from /etc/gromox/smtp.cfg, or when the -c option is used to specify a custom file:

Selects what kind of hello command is accepted of clients. Can be lmtp, smtp or both.
Default: both
Colon-separated list of directories which will be scanned when locating further configuration files, especially those used by plugin instances.
Default: /etc/gromox/smtp:/etc/gromox
Default: 256K
Default: 2M
Default: 200
Colon-separated list of directories which will be scanned when locating data files.
Default: /usr/share/gromox/smtp
A unique identifier for this system. It is used for greeting lines emitted by delivery-queue on the network.
Default: (system hostname)
AF_INET6 socket address to bind the LDA service to.
Default: ::
The TCP port to export the SMTP protocol service on.
Default: 25
The TCP port to expose the implicit-TLS SMTP protocol service on.
Default: (unset)
Target for log messages here. Special values: "-" (stderr/syslog depending on parent PID) or "syslog" are recognized.
Default: - (auto)
Maximum verbosity of logging. 1=crit, 2=error, 3=warn, 4=notice, 5=info, 6=debug.
Default: 4 (notice)
The maximum number of connections that each thread is allowed to process.
Default: 40
The minimum number of client processing threads to keep around.
Default: 1
Maximum permitted length of a message.
Default: 64M
An unprivileged user account to switch the process to after startup. To inhibit the switch, assign the empty value.
Default: gromox
The password to unlock TLS certificates.
Default: (unset)
Filesystem path to a certificate file for use with encrypted connection. The complete certificate chain should be present (as there is no other config directive to pull CA certs in).
Default: (unset)
If an SMTP connection stalls for the given period, the connection is terminated.
Default: 3 minutes
This flag controls whether clients must utilize TLS, either by way of implicit TLS (cf. lda_listen_tls_port), or through the STARTTLS command.
Default: false
Filesystem path to the key file needed to unlock the TLS certificate.
Default: (unset)
This flag controls the offering of the PIPELINING extension (RFC 2920) to clients.
Default: true
This flag controls the offering of the STARTTLS extension (RFC 3027) to clients.
Default: false
Directory for runtime variadic data.
Default: /var/lib/gromox
The lowest TLS version to offer. Possible values are: tls1.0, tls1.1, tls1.2, and, if supported by the system, tls1.3.
Default: tls1.2

Files

  • data_file_path/smtp_code.txt: Mapping from internal SMTP error codes to textual descriptions.
  • /usr/lib/gromox/libgxs_*.so: flusher plugins
  • /usr/lib/gromox/libgxs_*.so: service plugins

See also

gromox(7), delivery(8gx), midb_agent(4gx)

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