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git-send-email.perl - try to give real name of the calling host to HELO/EHLO 

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]

The maildomain*() code is based on ideas in Perl library
Test::Reporter by Graham Barr <gbarr@pobox.com> and Mark Overmeer
<mailtools@overmeer.net> released under the same terms as Perl
itself.

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jari Aalto 2010-03-14 17:16:45 +02:00 committed by Junio C Hamano
parent f60812efa3
commit 134550fe21
1 changed files with 67 additions and 1 deletions
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68
git-send-email.perl
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@ -64,6 +64,7 @@ sub usage {
--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 +132,8 @@ sub format_2822_time {
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();
@ -274,6 +277,7 @@ sub signal_handler {
"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 +838,62 @@ 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
#
# This maildomain*() code is based on ideas in Perl library Test::Reporter
# /usr/share/perl5/Test/Reporter/Mail/Util.pm ==> sub _maildomain ()
sub maildomain_net
{
my $maildomain;
if (eval { require Net::Domain; 1 }) {
my $domain = Net::Domain::domainname();
$maildomain = $domain
unless $^O eq 'darwin' && $domain =~ /\.local$/;
}
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
unless $^O eq 'darwin' && $domain =~ /\.local$/;
last if $maildomain;
}
}
}
return $maildomain;
}
sub maildomain
{
return maildomain_net() || maildomain_mta() || $mail_domain_default;
}
# Returns 1 if the message was sent, and 0 otherwise.
# In actuality, the whole program dies when there
# is an error sending a message.
@ -936,13 +996,18 @@ sub send_message
if ($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,
Hello => $mail_domain,
Debug => $debug_net_smtp);
if ($smtp_encryption eq 'tls' && $smtp) {
require Net::SMTP::SSL;
@ -965,6 +1030,7 @@ sub send_message
die "Unable to initialize SMTP properly. Check config and use --smtp-debug. ",
"VALUES: server=$smtp_server ",
"encryption=$smtp_encryption ",
"maildomain=$mail_domain",
defined $smtp_server_port ? "port=$smtp_server_port" : "";
}