142 lines
		
	
	
		
			3.7 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			142 lines
		
	
	
		
			3.7 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
# Configuration for `ssmtp', a trivial mail transfer agent that can
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# replace sendmail/postfix on simple systems.  It delivers email
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# directly to an SMTP server defined in its configuration file, wihout
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# queueing mail locally.
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{ config, lib, pkgs, ... }:
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with lib;
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let
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  cfg = config.networking.defaultMailServer;
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in
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{
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  options = {
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    networking.defaultMailServer = {
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      directDelivery = mkOption {
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        type = types.bool;
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        default = false;
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        example = true;
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        description = ''
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          Use the trivial Mail Transfer Agent (MTA)
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          <command>ssmtp</command> package to allow programs to send
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          e-mail.  If you don't want to run a “real” MTA like
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          <command>sendmail</command> or <command>postfix</command> on
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          your machine, set this option to <literal>true</literal>, and
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          set the option
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          <option>networking.defaultMailServer.hostName</option> to the
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          host name of your preferred mail server.
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        '';
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      };
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      hostName = mkOption {
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        type = types.str;
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        example = "mail.example.org";
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        description = ''
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          The host name of the default mail server to use to deliver
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          e-mail.
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        '';
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      };
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      root = mkOption {
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        type = types.str;
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        default = "";
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        example = "root@example.org";
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        description = ''
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          The e-mail to which mail for users with UID < 1000 is forwarded.
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        '';
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      };
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      domain = mkOption {
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        type = types.str;
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        default = "";
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        example = "example.org";
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        description = ''
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          The domain from which mail will appear to be sent.
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        '';
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      };
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      useTLS = mkOption {
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        type = types.bool;
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        default = false;
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        example = true;
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        description = ''
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          Whether TLS should be used to connect to the default mail
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          server.
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        '';
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      };
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      useSTARTTLS = mkOption {
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        type = types.bool;
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        default = false;
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        example = true;
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        description = ''
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          Whether the STARTTLS should be used to connect to the default
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          mail server.  (This is needed for TLS-capable mail servers
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          running on the default SMTP port 25.)
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        '';
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      };
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      authUser = mkOption {
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        type = types.str;
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        default = "";
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        example = "foo@example.org";
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        description = ''
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          Username used for SMTP auth. Leave blank to disable.
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        '';
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      };
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      authPass = mkOption {
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        type = types.str;
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        default = "";
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        example = "correctHorseBatteryStaple";
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        description = ''
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          Password used for SMTP auth. (STORED PLAIN TEXT, WORLD-READABLE IN NIX STORE)
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        '';
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      };
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      setSendmail = mkOption {
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        type = types.bool;
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        default = true;
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        description = "Whether to set the system sendmail to ssmtp's.";
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      };
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    };
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  };
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  config = mkIf cfg.directDelivery {
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    environment.etc."ssmtp/ssmtp.conf".text =
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      ''
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        MailHub=${cfg.hostName}
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        FromLineOverride=YES
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        ${if cfg.root != "" then "root=${cfg.root}" else ""}
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        ${if cfg.domain != "" then "rewriteDomain=${cfg.domain}" else ""}
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        UseTLS=${if cfg.useTLS then "YES" else "NO"}
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        UseSTARTTLS=${if cfg.useSTARTTLS then "YES" else "NO"}
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        #Debug=YES
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        ${if cfg.authUser != "" then "AuthUser=${cfg.authUser}" else ""}
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        ${if cfg.authPass != "" then "AuthPass=${cfg.authPass}" else ""}
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      '';
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    environment.systemPackages = [pkgs.ssmtp];
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    services.mail.sendmailSetuidWrapper = mkIf cfg.setSendmail {
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      program = "sendmail";
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      source = "${pkgs.ssmtp}/bin/sendmail";
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      setuid = false;
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      setgid = false;
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    };
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  };
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}
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