I am considering switching my smptd from sendmail to postfix, but I am a little confused. The following snip from http://www.postfix.org/SASL_README.html " /etc/sasl2/smtpd.conf: pwcheck_method: saslauthd mech_list: PLAIN LOGIN Do not specify any other mechanisms in mech_list than PLAIN or LOGIN when using saslauthd! It can only handle these two mechanisms, and authentication will fail if clients are allowed to choose other mechanisms. " Appears to be wrong! I have the sasl2 configuration: /etc/sasl2/Sendmail.conf: pwcheck_method: saslauthd mech_list: DIGEST-MD5 PLAIN >> DEFINITELY WORKING << Admittedly, I am using sendmail and not postfix so perhaps I have a miss configuartion somewhere. The server in question is using /etc/salsdb with some test users NOT having accounts on the server and the debug dialogs clearly show that DIGEST-MD5 is being used. The above quote, cut and paste from the readme, contains a clear enough statement, except for the grammer, ie the word "other" missing between the words "mech_list" and "than". But: I'm confused because I have a solid, tested, working example which contradicts the postfix readme. Is the operation of Sendmail.conf somehow different to smtpd.conf? Further on the readme does say: /etc/sasl2/smtpd.conf: pwcheck_method: auxprop auxprop_plugin: sasldb mech_list: CRAM-MD5 PLAIN Which also works. Is there a rational explanation or do I just put it down to a ghost in the machine?