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Author SHA1 Message Date
Thomas Hochstein 1a8bcbb788 Update POD documentation (repository, issue tracker).
Signed-off-by: Thomas Hochstein <thh@thh.name>
2024-05-27 00:58:32 +02:00
Thomas Hochstein e2b6ac2316 Add README.
Signed-off-by: Thomas Hochstein <thh@thh.name>
2024-05-25 23:33:00 +02:00
Thomas Hochstein 6d6b246d8c Change mail address.
Signed-off-by: Thomas Hochstein <thh@thh.name>
2020-08-23 22:39:36 +02:00
Thomas Hochstein f1cf1258ac Fix copyright in version display.
Signed-off-by: Thomas Hochstein <thh@inter.net>
2016-11-13 17:00:40 +01:00
Thomas Hochstein 2c2d7a35f6 Fix copyright and version in comment and POD, too.
Signed-off-by: Thomas Hochstein <thh@inter.net>
2016-11-13 17:00:11 +01:00
Thomas Hochstein 136e4166ed Fix display of CNAME/A records in log file.
print_dns_result() will show the number of records
found _and_ put a heading for this type of record
into the logfile.

So we can't get both right (short of changing
print_dns_result(), what I don't like to do
just now): either the count will be too high,
as we can't subtract wrong records from it, or
the "heading" will follow after the list of
records in the log. So we'll have to live with
the former, until print_dns_result() can be
fixed.

Signed-off-by: Thomas Hochstein <thh@inter.net>
2016-01-09 12:41:43 +01:00
3 changed files with 35 additions and 19 deletions

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@ -1,3 +1,12 @@
Version 0.6.3 (unreleased)
* Change mail address.
Thomas Hochstein <thh@thh.name> Sun Aug 23 22:37:10 2020 +0200
* Fix display of CNAME/A records in log file.
Thomas Hochstein <thh@inter.net> Sat Jan 9 12:34:21 2016 +0100
Version 0.6.2 (2016-01-09)
* Try to handle CNAMEs and resolve them to A records.

13
README.md Normal file
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@ -0,0 +1,13 @@
# checkmail
## Description
**checkmail** determines the mail server (or servers) responsible for the domain of the mail address (MXes); if none are available, it falls back on the host with the corresponding name (if available). It then establishes an SMTP connection and goes through the SMTP dialogue until just before an email is actually sent and checks whether mail to the recipient address would be accepted in principle. If desired, checkmail can also test sending to an address that is certainly invalid in order to check whether the replies from the recipient mail server are reliable at all or whether every recipient address is accepted (initially).
The sender of the apparent test email and the HELO parameter to be used can be configured in the script or passed as a parameter during the call.
Additional options can be used to check several addresses present in a text file, to display the complete SMTP dialogue or to force a connection to a specific mail server (instead of checking the relevant MXes).
## More information
Please see the [distribution page](https://th-h.de/net/software/checkmail/) (in German).

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@ -1,15 +1,15 @@
#! /usr/bin/perl -w
#
# checkmail Version 0.6.1 by Thomas Hochstein
# checkmail Version 0.6.3 by Thomas Hochstein
#
# This script tries to verify the deliverability of (a) mail address(es).
#
# Copyright (c) 2002-2011 Thomas Hochstein <thh@inter.net>
# Copyright (c) 2002-2016 Thomas Hochstein <thh@thh.name>
#
# It can be redistributed and/or modified under the same terms under
# which Perl itself is published.
our $VERSION = "0.6.2";
our $VERSION = "0.6.3 (unreleased)";
################################# Configuration ################################
# Please fill in a working configuration!
@ -39,7 +39,7 @@ getopts('Vhqlrf:m:s:e:', \%options);
# -V: display version
if ($options{'V'}) {
print "$myself v $VERSION\nCopyright (c) 2010-2016 Thomas Hochstein <thh\@inter.net>\n";
print "$myself v $VERSION\nCopyright (c) 2002-2016 Thomas Hochstein <thh\@thh.name>\n";
print "This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.\n";
exit(100);
};
@ -154,27 +154,23 @@ sub gettargets {
# no MX record found; log and try A record(s)
} else {
print_dns_result($domain,'MX',undef,$resolver->errorstring,$logr);
print(" Falling back to A record ...\n") if !($options{'q'});
print(" Falling back to A record(s) ...\n") if !($options{'q'});
# get A record(s)
# may get CNAMEs instead ...
if (my $query = $resolver->query($domain,'A','IN')) {
# save number of answers in a counter
my $acount = $query->header->ancount;
print_dns_result($domain,'A/CNAME',$query->header->ancount,undef,$logr);
foreach my $rr ($query->answer) {
if ($rr->type ne 'A') {
# decrease counter if it's not an A record
$acount--;
# report CNAMEs and don't add them to target list
if ($rr->type eq 'CNAME') {
printf (" ~ '%s' is a CNAME for '%s' and will be resolved accordingly. \n",$rr->name,$rr->cname) if !($options{'q'});
$$logr .= sprintf("CNAME resolved: %s -> %s\n",$rr->name,$rr->cname);
$$logr .= sprintf("- CNAME resolved: %s -> %s\n",$rr->name,$rr->cname);
}
next;
}
$targets{$rr->address} = 0;
$$logr .= sprintf("- %s\n",$rr->address);
};
print_dns_result($domain,'A',$acount,undef,$logr);
# no A record found either; log and fail
} else {
print_dns_result($domain,'A',undef,$resolver->errorstring,$logr);
@ -615,25 +611,23 @@ The script itself.
=head1 BUGS
Please report any bugs or feature request to the author or use the
bug tracker at L<http://bugs.th-h.de/>!
bug tracker at L<https://code.virtcomm.de/thh/checkmail/issues>!
=head1 SEE ALSO
L<http://th-h.de/download/scripts.php> will have the current
L<https://th-h.de/net/software/checkmail/> will have the current
version of this program.
This program is maintained using the Git version control system. You
may clone L<git://code.th-h.de/mail/checkmail.git> to check out the
current development tree or browse it on the web via
L<http://code.th-h.de/?p=mail/checkmail.git>.
This program is maintained using the Git version control system at
L<https://code.virtcomm.de/thh/checkmail>.
=head1 AUTHOR
Thomas Hochstein <thh@inter.net>
Thomas Hochstein <thh@thh.name>
=head1 COPYRIGHT AND LICENSE
Copyright (c) 2002-2010 Thomas Hochstein <thh@inter.net>
Copyright (c) 2002-2016 Thomas Hochstein <thh@thh.name>
This program is free software; you may redistribute it and/or modify it
under the same terms as Perl itself.