Was having an issue with testsaslauthd not working unless i specified a path in the command. Created a symlink, and was hoping fixing that would take care of it, but it didn't. It made testsaslauthd work without manually entering a path.
rm -rf /var/run/saslauthd
ln -s /var/spool/postfix/var/run/saslauthd /var/run/saslauthd
testsaslauthd -s smtp -u firstname.lastname@example.org -p password