Does the error occur without the patch? Does your patch solve it? If yes, what is it you are asking us? If not, what's the new problem?

The correct way to submit patches is the bug tracker, so if you think your patch is good, add test cases to the test suite, update the documentation if anything needs documenting, and submit your code+docs+tests patch to RT.

Please don't post off-site links that contain relevant content here. Please post the relevant discussion and code here, so that the discussion here stays within context. Thanks.

with the minimal exemple

#!/usr/bin/perl -w

use MIME::Lite;
use strict;
use warnings;


my$msg = MIME::Lite->new ( 
    From     =>  'fakessh@fakessh.eu',
    To       =>  'john.swilting@wanadoo.fr',
    Subject  =>  'test'
    );
$msg->send('tls','domaine.tld',Hello => 'domaine.tld', Port => "587", 
+User => "john" , Password => "azerty" , Debug => 4 );
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attempting to issue an email fails . I quote the response of perl -d

~]# perl -d mailtomail3.pl 

Loading DB routines from perl5db.pl version 1.28
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(mailtomail3.pl:8):       my$msg = MIME::Lite->new ( 
main::(mailtomail3.pl:9):           From     =>  'fakessh@fakessh.eu',
main::(mailtomail3.pl:10):          To       =>  'john.swilting@wanado
+o.fr',
main::(mailtomail3.pl:11):          Subject  =>  'test'
main::(mailtomail3.pl:12):          );
  DB<1> c
SMTP mail() command failed: 
MIME::Lite::SMTP::TLS=HASH(0x875a62c)
 at /usr/lib/perl5/vendor_perl/5.8.8/MIME/Lite.pm line 2941
        MIME::Lite::send_by_tls('MIME::Lite=HASH(0x845e204)', 'mail.fa
+kessh.eu', 'Hello', 'fakessh.eu', 'Port', 587, 'User', 'fakessh', 'Pa
+ssword', ...) called at /usr/lib/perl5/vendor_perl/5.8.8/MIME/Lite.pm
+ line 2581
        MIME::Lite::send('MIME::Lite=HASH(0x845e204)', 'tls', 'mail.fa
+kessh.eu', 'Hello', 'fakessh.eu', 'Port', 587, 'User', 'fakessh', ...
+) called at mailtomail3.pl line 13
Debugged program terminated.  Use q to quit or R to restart,
  use o inhibit_exit to avoid stopping after program termination,
  h q, h R or h o to get additional info.  
  DB<1> q
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is the mail command that happens with errors

$msg->send('tls',
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Why do you think that 'tls' is a valid first parameter for ->send() ? Also see Using MIME::Lite with TLS, add to MIME::Lite support for smtp tls on port 587, and likely Google.