7 sendmail: Sending E-Mail
The
net/sendmail module
provides tools for sending electronic mail messages using a
sendmail program on the local system. See also the
net/smtp package, which sends mail via SMTP.
All strings used in mail messages are assumed to conform to their
corresponding SMTP specifications, except as noted otherwise.
7.1 Sendmail Functions
The first argument is the header for the sender, the second is the
subject line, the third a list of “To:” recipients, the fourth a list
of “CC:” recipients, and the fifth a list of “BCC:” recipients. All
of these are quoted if they contain non-ASCII characters.
Note that passing already-quoted strings would be fine,
since then there are no non-ASCII characters.
Additional arguments argument supply other mail headers, which must be
provided as lines (not terminated by a linefeed or carriage return) to
include verbatim in the header.
The return value is an output port into which the client must write
the message. Clients are urged to use close-output-port on
the return value as soon as the necessary text has been written, so
that the sendmail process can complete.
The from argument can be any value; of course, spoofing should
be used with care. If it is #f, no “From:” header is
generated, which usually means that your sendmail program will fill in
the right value based on the user.
Lines that contain a single period do not need to be quoted.
7.2 Sendmail Unit
sendmail@ and sendmail^ are deprecated.
They exist for backward-compatibility and will likely be removed in
the future. New code should use the net/sendmail module.
7.3 Sendmail Signature
Includes everything exported by the net/sendmail module.