--smtp-pass <str> * Password for SMTP-AUTH; not necessary.
--smtp-encryption <str> * tls or ssl; anything else disables.
--smtp-ssl * Deprecated. Use '--smtp-encryption ssl'.
+ --smtp-domain <str> * The domain name sent to HELO/EHLO handshake
+ --smtp-debug <0|1> * Disable, enable Net::SMTP debug.
Automating:
--identity <str> * Use the sendemail.<id> options.
my $have_mail_address = eval { require Mail::Address; 1 };
my $smtp;
my $auth;
+my $mail_domain_default = "localhost.localdomain";
+my $mail_domain;
sub unique_email_list(@);
sub cleanup_compose_files();
my ($validate, $confirm);
my (@suppress_cc);
+my ($debug_net_smtp) = 0; # Net::SMTP, see send_message()
+
my $not_set_by_user = "true but not set by the user";
my %config_bool_settings = (
"smtp-pass:s" => \$smtp_authpass,
"smtp-ssl" => sub { $smtp_encryption = 'ssl' },
"smtp-encryption=s" => \$smtp_encryption,
+ "smtp-debug:i" => \$debug_net_smtp,
+ "smtp-domain:s" => \$mail_domain,
"identity=s" => \$identity,
"annotate" => \$annotate,
"compose" => \$compose,
# We'll setup a template for the message id, using the "from" address:
my ($message_id_stamp, $message_id_serial);
-sub make_message_id
-{
+sub make_message_id {
my $uniq;
if (!defined $message_id_stamp) {
$message_id_stamp = sprintf("%s-%s", time, $$);
}
# use the simplest quoting being able to handle the recipient
-sub sanitize_address
-{
+sub sanitize_address {
my ($recipient) = @_;
my ($recipient_name, $recipient_addr) = ($recipient =~ /^(.*?)\s*(<.*)/);
}
+# Returns the local Fully Qualified Domain Name (FQDN) if available.
+#
+# Tightly configured MTAa require that a caller sends a real DNS
+# domain name that corresponds the IP address in the HELO/EHLO
+# handshake. This is used to verify the connection and prevent
+# spammers from trying to hide their identity. If the DNS and IP don't
+# match, the receiveing MTA may deny the connection.
+#
+# Here is a deny example of Net::SMTP with the default "localhost.localdomain"
+#
+# Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
+# Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
+#
+# This maildomain*() code is based on ideas in Perl library Test::Reporter
+# /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
+
+sub valid_fqdn {
+ my $domain = shift;
+ return !($^O eq 'darwin' && $domain =~ /\.local$/) && $domain =~ /\./;
+}
+
+sub maildomain_net {
+ my $maildomain;
+
+ if (eval { require Net::Domain; 1 }) {
+ my $domain = Net::Domain::domainname();
+ $maildomain = $domain if valid_fqdn($domain);
+ }
+
+ return $maildomain;
+}
+
+sub maildomain_mta {
+ my $maildomain;
+
+ if (eval { require Net::SMTP; 1 }) {
+ for my $host (qw(mailhost localhost)) {
+ my $smtp = Net::SMTP->new($host);
+ if (defined $smtp) {
+ my $domain = $smtp->domain;
+ $smtp->quit;
+
+ $maildomain = $domain if valid_fqdn($domain);
+
+ last if $maildomain;
+ }
+ }
+ }
+
+ return $maildomain;
+}
+
+sub maildomain {
+ return maildomain_net() || maildomain_mta() || $mail_domain_default;
+}
+
# Returns 1 if the message was sent, and 0 otherwise.
# In actuality, the whole program dies when there
# is an error sending a message.
-sub send_message
-{
+sub send_message {
my @recipients = unique_email_list(@to);
@cc = (grep { my $cc = extract_valid_address($_);
not grep { $cc eq $_ } @recipients
if ($smtp_encryption eq 'ssl') {
$smtp_server_port ||= 465; # ssmtp
require Net::SMTP::SSL;
- $smtp ||= Net::SMTP::SSL->new($smtp_server, Port => $smtp_server_port);
+ $mail_domain ||= maildomain();
+ $smtp ||= Net::SMTP::SSL->new($smtp_server,
+ Hello => $mail_domain,
+ Port => $smtp_server_port);
}
else {
require Net::SMTP;
+ $mail_domain ||= maildomain();
$smtp ||= Net::SMTP->new((defined $smtp_server_port)
? "$smtp_server:$smtp_server_port"
- : $smtp_server);
+ : $smtp_server,
+ Hello => $mail_domain,
+ Debug => $debug_net_smtp);
if ($smtp_encryption eq 'tls' && $smtp) {
require Net::SMTP::SSL;
$smtp->command('STARTTLS');
}
if (!$smtp) {
- die "Unable to initialize SMTP properly. Is there something wrong with your config?";
+ die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
+ "VALUES: server=$smtp_server ",
+ "encryption=$smtp_encryption ",
+ "maildomain=$mail_domain",
+ defined $smtp_server_port ? "port=$smtp_server_port" : "";
}
if (defined $smtp_authuser) {