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Description of problem:
It seems the ntlm_v2 option is not read from the config file for the SASL client.

Version-Release number of selected component (if applicable):
cyrus-sasl-2.1.26-23.el7.x86_64
cyrus-sasl-ntlm-2.1.26-23.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Setup sendmail to use NTLM SASL auth
2. echo "ntlm_v2: yes" > /etc/sasl2/smtp.conf


Actual results:
Postfix calls 'sasl_client_init' with service name set to 'smtp', but file /etc/sasl2/smtp.conf is not read and ntlm_v2 is still set to '(null)'.

Expected results:
/etc/sasl2/smtp.conf read and ntlm_v2 initialized to 'yes', so the NTLM plugin will use the ntlm_v2.

Additional info:

https://bugzilla.redhat.com/show_bug.cgi?id=1722159

*** This bug has been marked as a duplicate of bug 1722159 ***