Add new functions maildomain_net(), maildomain_mta() and
maildomain(), which return FQDN where possible for use in
send_message(). The value is passed to Net::SMTP HELO/EHLO
handshake. The domain name can also be set via new --smtp-domain
option.
The default value in Net::SMTP may not get through:
Net::SMTP=GLOB(0x267ec28)>>> EHLO localhost.localdomain
Net::SMTP=GLOB(0x267ec28)<<< 550 EHLO argument does not match calling host
whereas using the FQDN that matches the IP, the result is:
Net::SMTP=GLOB(0x15b8e80)>>> EHLO host.example.com
Net::SMTP=GLOB(0x15b8e80)<<< 250-host.example.com Hello host.example.com [192.168.1.7]
Signed-off-by: Jari Aalto <jari.aalto@xxxxxxxxx>
---
git-send-email.perl | 83 +++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 81 insertions(+), 2 deletions(-)
==============================
This is REVISION 3, reworked
==============================
diff --git a/git-send-email.perl b/git-send-email.perl
index 6af7bd3..80de092 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -64,6 +64,7 @@ git send-email [options] <file | directory | rev-list options >
--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:
@@ -131,6 +132,7 @@ my $have_email_valid = eval { require Email::Valid; 1 };
my $have_mail_address = eval { require Mail::Address; 1 };
my $smtp;
my $auth;
+my $mail_domain;
sub unique_email_list(@);
sub cleanup_compose_files();
@@ -274,6 +276,7 @@ my $rc = GetOptions("sender|from=s" => \$sender,
"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,
@@ -834,6 +837,74 @@ sub sanitize_address
}
+# 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
+
+sub maildomain_net
+{
+ my $maildomain;
+ eval "use Net::Domain";
+
+ unless ($@) {
+ eval "use Net::Domain";
+ unless ($@) {
+ my $domain = Net::Domain::domainname();
+ $maildomain = $domain
+ unless $^O eq 'darwin' && $domain =~ /\.local$/;
+ }
+ }
+
+ $maildomain;
+}
+
+sub maildomain_mta
+{
+ my $maildomain;
+ eval "use Net::SMTP";
+
+ unless ($@) {
+ for my $host (qw(mailhost localhost)) {
+ my $smtp = Net::SMTP->new($host);
+ if (defined $smtp) {
+ my $domain = $smtp->domain;
+ $smtp->quit;
+
+ $maildomain = $domain
+ unless $^O eq 'darwin' && $domain =~ /\.local$/;
+
+ last if $maildomain;
+ }
+ }
+ }
+
+ $maildomain;
+}
+
+{
+ my $mail_domain_system; # Static variable
+sub maildomain
+{
+ if ($mail_domain) {
+ $mail_domain # Command line
+ } elsif ($mail_domain_system) { # Saved system default
+ $mail_domain_system;
+ } else {
+ $mail_domain_system = maildomain_net() ||
+ maildomain_mta() ||
+ "localhost.localdomain";
+ }
+}}
+
# Returns 1 if the message was sent, and 0 otherwise.
# In actuality, the whole program dies when there
# is an error sending a message.
@@ -917,6 +988,8 @@ X-Mailer: git-send-email $gitversion
}
}
+ my $maildomain;
+
if ($dry_run) {
# We don't want to send the email.
} elsif ($smtp_server =~ m#^/#) {
@@ -936,13 +1009,18 @@ X-Mailer: git-send-email $gitversion
if ($smtp_encryption eq 'ssl') {
$smtp_server_port ||= 465; # ssmtp
require Net::SMTP::SSL;
- $smtp ||= Net::SMTP::SSL->new($smtp_server, Port => $smtp_server_port);
+ $maildomain = maildomain();
+ $smtp ||= Net::SMTP::SSL->new($smtp_server,
+ Hello => $maildomain,
+ Port => $smtp_server_port);
}
else {
require Net::SMTP;
+ $maildomain = maildomain();
$smtp ||= Net::SMTP->new((defined $smtp_server_port)
? "$smtp_server:$smtp_server_port"
: $smtp_server,
+ Hello => $maildomain,
Debug => $debug_net_smtp);
if ($smtp_encryption eq 'tls' && $smtp) {
require Net::SMTP::SSL;
@@ -962,9 +1040,10 @@ X-Mailer: git-send-email $gitversion
}
if (!$smtp) {
- die "Unable to initialize SMTP properly. Check config. ",
+ die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
"VALUES: server=$smtp_server ",
"encryption=$smtp_encryption ",
+ "maildomain=$maildomain",
defined $smtp_server_port ? "port=$smtp_server_port" : "";
}
--
1.7.0
--
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