ESMTPRC(5)							File Formats Manual							ESMTPRC(5)

NAME

       esmtprc - esmtp configuration file.

DESCRIPTION

       A esmtp configuration file consists of several options.	The options format is:

	   keyword=value

       The  equal sign is optional and can be replaced by whitespace.  The value may be enclosed in simple or double quotes, in which case special
       characters can be escaped as in normal C strings.

       Comments are delimited by the '#' character up to the newline character.

OPTIONS

       hostname
	      Set SMTP host and service (port).

	      The format is:

		  host.example.org[:service]

	      With no whitespace surrounding the colon if service is specified. service may be a name from /etc/services or a decimal port number.
	      If not specified the port defaults to 587.

	      Note  (from  libESMTP documentation): the default port number is set to 587 since this is the port that should be used for mail sub-
	      mission, see RFC 2476.  By choosing this default now, the API does not change behavior unexpectedly in the future as use of the  new
	      standard	becomes  commonplace.  The host-port notation simplifies things for the application, the user can type "localhost:smtp" or
	      "localhost:25" where the application expects a host name.

       username
	      Set the username for authentication with the SMTP server.

	      Do NOT set the username and password in the system configuration file unless you are the only user of this machine.   Esmtp  is  not
	      run with suid privileges therefore the system configuration file must be readable by everyone.  If your SMTP server requires authen-
	      tication and you are not the only user then specify your personal SMTP account details in the user configuration file.

       password
	      Set the password for authentication with the SMTP server.

       starttls
	      Whether to use the StartTLS extension.

	      It can be one of enabled, disabled or required. It defaults to disabled.

       certificate_passphrase
	      Set the certificate passphrase for the StartTLS extension.

       helo   Set the hostname to identify as when sending HELO or EHLO commands.  (This is a per identity option, as it should be  the  name  you
	      are seen as from the connected host, which may vary with host to host due to NAT or different naming schemes).

       qualifydomain
	      Make all local addresses to remote ones by adding @ and this name.

       force sender
	      Set a "Sender:" header and ignore those in the message. "%u" will be replaced with the username. "%%" by "%".

       force reverse_path
	      Set  the	envelope  from	address. The address given to -f will only be used as "From:" when the message contains none. "%u" will be
	      replaced with the username. "%%" by "%".

       message_id
	      Whether to set the Message-ID field of the message before sending.  Normally the receiving MTA sets the Message-ID  if  missing,	so
	      you can turn this off if your sending host does not have a fully qualified domain name.

	      Allowed values are either enabled or disabled. It defaults to enabled

       preconnect
	      Shell command to execute prior to opening an SMTP connection.

	      This may be useful in conjunction with application-level transports (e.g.  ssh with its port-forwarding functionality) to secure the
	      SMTP connection. Esmtp will wait for the command to exit before proceeding.  If the command returns a non-zero status, delivery will
	      be aborted.

       identity
	      Define an identity.

	      An identity is a set of options associated with a given address.	For example:

		  identity = myself@somewhere.com
		      hostname = smtp.somewhere.com:25
		      username = "myself"
		      password = "secret"

	      Identities are be selected by the address specified in the -f flag.  You can have as many you like.

	      The  options  in	the  global section (up to the first identity option) constitute the default identity. If no options in the global
	      section are given then the first defined identity is taken as the default one.

	      Note that the default identity settings are not shared by the other identities.  Everything (username, password, etc.) must be spec-
	      ified for every identity even if they don't differ from the default identity.

       mda    Set the Mail Delivery Agent (MDA).

	      Esmtp  relies upon a MDA for local mail delivery, i.e., addresses without a '@' character.  A non-zero error status tells esmtp that
	      delivery failed.

	      The local delivery addresses will be inserted into the MDA command wherever you place a %T.  The mail message's From address will be
	      inserted where you place an %F.

	      Some common MDAs are "/usr/bin/procmail -d %T", "/usr/bin/deliver" and "/usr/lib/mail.local %T".

       force_mda
	      Force mail to be delivered by the MDA.

	      When  set,  any  mail  from anywhere to anywhere will instead be delivered to the value of force_mda. It will also only be delivered
	      locally, via the mda. This will let you have a very minimal mail set-up, which can ONLY handle local mail.

	      For example:

		  mda = "procmail -d %T"
		  force_mda = "someuser"

SEE ALSO

       esmtp(1)

AUTHOR

       Jose Fonseca

																	ESMTPRC(5)