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  submission,  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  authentication  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 specified 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

       José Fonseca

                                                                                       ESMTPRC(5)