Hello, a mailserver is offering those algorithms after STARTTLS:
250-AUTH GSSAPI NTLM LOGIN Now, libcurl GSSAPI seems broken and it fails due to this. The initial idea was to stop libcurl from using GSSAPI, but I found no option to exclude such for SMTP. So I tried to force libcurl to use NTLM using CURLOPT_LOGIN_OPTIONS with "AUTH=NTLM" This works, but what happens if another customers mailserver does not offer NTLM but PLAIN, LOGIN or CRAM-MD5? I tried but after setting such, it is no longer using any other option. I also tried to do like this: "AUTH=NTLM CRAM-MD5 LOGIN PLAIN" but then I get CURL error 3 (CURLE_URL_MALFORMAT / The URL was not properly formatted. ). So, how to simply exclude GSSAPI or make CURLOPT_LOGIN_OPTIONS accepting multiple values like "AUTH=NTLM CRAM-MD5 LOGIN PLAIN"? Thanks!
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