Re: [Regression since 8.18.0] SMTP GSSAPI authentication in curl_sasl skipped with --negotiate -u

Alexandr Timofeev via curl-library <[email protected]> Mon, 6 Jul 2026 16:44:57 +0300

Newsgroups	gmane.comp.web.curl.library
Message-ID	<CAC4TuErv93jSD8UOO1eQGS2xzP-pwr6g+NJzViOts-K26sM_CQ@mail.gmail.com>

> Can you check if https://github.com/curl/curl/pull/22044 solves your problem?

Sorry for the delay in reply, and thanks for the fix.

I have checked, and the problem seems to be fixed with curl 8.21.0-rc3.

For the history, curl.exe (8.21.0-rc3) outputs the following:
  < 250-AUTH GSSAPI NTLM
  ...
  > AUTH GSSAPI
  < 334 GSSAPI supported
  ...
  < 235 2.7.0 Authentication successful
  > MAIL FROM:<[email protected]> SIZE=164
  ...

This output is consistent with 8.16.0, which didn't have the regression.

Thanks,
Alexandr Timofeev
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