With sendmail, drop the solved
part in the search and only search in the XAMPP for Windows forum in English.
The 'How To Search' announcement may help:viewtopic.php?f=16&t=32670
The same applies to MercuryMail - try a forum search as this has been discussed many times and if I recall correctly there is even a step by step.
I don't know anything about Thunderbird except it is an email client.
The setting for smtp and pop would be the same as you setup in MercuryMail, I assume.
MercuryMail have a community forum...http://community.pmail.com/forums/defau ... ?GroupID=7http://community.pmail.com/forums/9/ShowForum.aspx
...and the documentation in the \xampp\MercuryMail\man-461.pdf will be very helpful for learning the ropes.
You may also have to check with your ISP that will allow you to send email from your PC or you will just be going round in circles trying to get past your ISP's blocked ports.