> > > May 10 09:17:42 smtp01 postfix/smtpd[21033]: warning: SASL > authentication failure: cannot connect to saslauthd server: No such file > or directory > this is a problem
> > /var/run/saslauthd is present - yes > /var/spool/postfix/var/run/saslauthd is present - yes > Is one dir link to another? Do you see any files there? Run saslauthd from the command line with the "-d" argument: it should print the name of the socket it listens to or use tool like "ss" to check the socket. Check that account used by postfix has access to this folder.