CHANGES.txt

2005-11-10
* published
2005-05-10
* received patches from Johan Nilsson <johann (at) axis.com>
2006-07-20
* received patches from Geoff Crompton <geoff.crompton@strategicdata.com.au>
2007-04-24
* packaged ePN version of the plugins -- the __END__ block for embedded documentation was causing an error because of the way ePN wraps the perl scripts. see http://nagios.sourceforge.net/docs/2_0/embeddedperl.html
* added SSL support using patch from Benjamin Ritcey <ben@ritcey.com>
2007-10-21
* added TLS support for SMTP using Net::SMTP::TLS
* added SSL support for SMTP using Net::SMTP::SSL, but NOTE that I don't have access to an SMTPS server so I cannot test this. 
2007-12-04
* small fix with SSL support for IMAP related to bugfix in Mail::IMAPClient 3.00 over 2.2.9 thanks to Seth P. Low <low@modog.com>
* added --usage option to all three plugins for familiarity with the official nagios plugins
2017-11-03
* Author: jtlatuvm from nagios plugin page (comment)
* check_smtp_send depends on Net::SMTP::TLS which is no longer maintained and breaks with new IO::Socket::SSL. That's when you'll see: invalid SSL_version specified
* The fix is to change check_smtp_send to use Net::SMTP which now directly supports STARTTLS.