I'm using sendmail as a client to authenticate to MS Exchange server, which suppports AUTH GSSAPI NTLM LOGIN I compiled sasl-2.1.22 with --enable-login and --enable-ntlm Then recompiled sendmail-8.13.6 with sasl2 support. I use TLS for protecting plain text passwords. This is the error I'm getting in my maillog: AUTH=client, available mechanisms do not fulfill requirements What might be wrong? Thanks. Arkadi. - - - - - - - Appended by Invidi Technologies Corporation. - - - - - - - DISCLAIMER: This email message is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited.