easy:SetOpt_Login_Options(options)
options
string to use for the transfer.
For more information about the login options please see RFC2384, RFC5092 and IETF draft draft-earhart-url-smtp-00.txt
#CURLOPT_LOGIN_OPTIONS
can be used to get protocol specific login
options, such as the preferred authentication mechanism via "AUTH=NTLM" or
"AUTH=*", and should be used in conjunction with the #CURLOPT_USERNAME
option.