nixpkgs/modules/programs/ssmtp.nix

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# Configuration for `ssmtp', a trivial mail transfer agent that can
# replace sendmail/postfix on simple systems. It delivers email
# directly to an SMTP server defined in its configuration file, wihout
# queueing mail locally.
{config, pkgs, ...}:
with pkgs.lib;
let
options = {
networking.defaultMailServer = {
directDelivery = mkOption {
default = false;
example = true;
description = "
Use the trivial Mail Transfer Agent (MTA)
<command>ssmtp</command> package to allow programs to send
e-mail. If you don't want to run a ``real'' MTA like
<command>sendmail</command> or <command>postfix</command> on
your machine, set this option to <literal>true</literal>, and
set the option
<option>networking.defaultMailServer.hostName</option> to the
host name of your preferred mail server.
";
};
hostName = mkOption {
example = "mail.example.org";
description = "
The host name of the default mail server to use to deliver
e-mail.
";
};
domain = mkOption {
default = "";
example = "example.org";
description = "
The domain from which mail will appear to be sent.
";
};
useTLS = mkOption {
default = false;
example = true;
description = "
Whether TLS should be used to connect to the default mail
server.
";
};
useSTARTTLS = mkOption {
default = false;
example = true;
description = "
Whether the STARTTLS should be used to connect to the default
mail server. (This is needed for TLS-capable mail servers
running on the default SMTP port 25.)
";
};
};
};
cfg = config.networking.defaultMailServer;
in
mkIf cfg.directDelivery {
require = [options];
environment.etc =
[ { source = pkgs.writeText "ssmtp.conf" ''
MailHub=${cfg.hostName}
FromLineOverride=YES
${if cfg.domain != "" then "rewriteDomain=${cfg.domain}" else ""}
UseTLS=${if cfg.useTLS then "YES" else "NO"}
UseSTARTTLS=${if cfg.useSTARTTLS then "YES" else "NO"}
#Debug=YES
'';
target = "ssmtp/ssmtp.conf";
}
];
environment.systemPackages = [pkgs.ssmtp];
}