Fixed SmtpClient to send BDAT instead of DATA when using the BINARYMIME extension
Fixed SmtpClient to send BDAT instead of DATA when using the BINARYMIME extension

Fixes issue #151

jstedfast/MailKit,sstraus/MailKit,FubarDevelopment/MailKit,dsbenghe/MailKit,nachocove/MailKit,mganss/MailKit,jamie-dainton/MailKit,eino-makitalo/MailKit,matt2003/MailKit