import ./make-test.nix { name = "opensmtpd"; nodes = { smtp1 = { pkgs, ... }: { imports = [ common/user-account.nix ]; networking = { firewall.allowedTCPPorts = [ 25 ]; useDHCP = false; interfaces.eth1.ipv4.addresses = pkgs.lib.mkOverride 0 [ { address = "192.168.1.1"; prefixLength = 24; } ]; }; environment.systemPackages = [ pkgs.opensmtpd ]; services.opensmtpd = { enable = true; extraServerArgs = [ "-v" ]; serverConfiguration = '' listen on 0.0.0.0 action do_relay relay # DO NOT DO THIS IN PRODUCTION! # Setting up authentication requires a certificate which is painful in # a test environment, but THIS WOULD BE DANGEROUS OUTSIDE OF A # WELL-CONTROLLED ENVIRONMENT! match from any for any action do_relay ''; }; }; smtp2 = { pkgs, ... }: { imports = [ common/user-account.nix ]; networking = { firewall.allowedTCPPorts = [ 25 143 ]; useDHCP = false; interfaces.eth1.ipv4.addresses = pkgs.lib.mkOverride 0 [ { address = "192.168.1.2"; prefixLength = 24; } ]; }; environment.systemPackages = [ pkgs.opensmtpd ]; services.opensmtpd = { enable = true; extraServerArgs = [ "-v" ]; serverConfiguration = '' listen on 0.0.0.0 action dovecot_deliver mda \ "${pkgs.dovecot}/libexec/dovecot/deliver -d %{user.username}" match from any for local action dovecot_deliver ''; }; services.dovecot2 = { enable = true; enableImap = true; mailLocation = "maildir:~/mail"; protocols = [ "imap" ]; }; }; client = { pkgs, ... }: { networking = { useDHCP = false; interfaces.eth1.ipv4.addresses = pkgs.lib.mkOverride 0 [ { address = "192.168.1.3"; prefixLength = 24; } ]; }; environment.systemPackages = let sendTestMail = pkgs.writeScriptBin "send-a-test-mail" '' #!${pkgs.python3.interpreter} import smtplib, sys with smtplib.SMTP('192.168.1.1') as smtp: smtp.sendmail('alice@[192.168.1.1]', 'bob@[192.168.1.2]', """ From: alice@smtp1 To: bob@smtp2 Subject: Test Hello World """) ''; checkMailLanded = pkgs.writeScriptBin "check-mail-landed" '' #!${pkgs.python3.interpreter} import imaplib with imaplib.IMAP4('192.168.1.2', 143) as imap: imap.login('bob', 'foobar') imap.select() status, refs = imap.search(None, 'ALL') assert status == 'OK' assert len(refs) == 1 status, msg = imap.fetch(refs[0], 'BODY[TEXT]') assert status == 'OK' content = msg[0][1] print("===> content:", content) split = content.split(b'\r\n') print("===> split:", split) lastline = split[-3] print("===> lastline:", lastline) assert lastline.strip() == b'Hello World' ''; in [ sendTestMail checkMailLanded ]; }; }; testScript = '' startAll; $client->waitForUnit("network-online.target"); $smtp1->waitForUnit('opensmtpd'); $smtp2->waitForUnit('opensmtpd'); $smtp2->waitForUnit('dovecot2'); # To prevent sporadic failures during daemon startup, make sure # services are listening on their ports before sending requests $smtp1->waitForOpenPort(25); $smtp2->waitForOpenPort(25); $smtp2->waitForOpenPort(143); $client->succeed('send-a-test-mail'); $smtp1->waitUntilFails('smtpctl show queue | egrep .'); $smtp2->waitUntilFails('smtpctl show queue | egrep .'); $client->succeed('check-mail-landed >&2'); ''; }