Am 02.06.2017 um 08:31 schrieb Roelof Wobben:
pwcheck_method = auxprop auxprop_plugin = sasldb2 mech_list = plain login cram-md5 digest-md5 ntlm
That's wrong syntax. That mistake creates the very same Postfix error log messages for me too testing your issue.
Correct it to: pwcheck_method: auxprop auxprop_plugin: sasldb2 mech_list: plain login cram-md5 digest-md5 ntlm Alexander