As for the NIS lookup warning, the goog found this...
It's a warning, not an error. You eliminate it by removing NIS lookups.
First, find out what setting is using NIS:
$ postconf | grep nis:
This outputs something like
alias_maps = hash:/etc/aliases nis:mail.aliases
alias_maps = hash:/etc/mail/aliases nis:mail.aliases
Then, disable NIS lookups (as root):
# postconf -e alias_maps=hash:/etc/aliases
# postconf -e alias_maps=hash:/etc/mail/aliases
The exact command depends on "postconf | grep nis:" output.
And here is another comment that explains why a bit better...
First of I didn’t ask postfix to do NIS lookups. These warning messages started showing up when I commented out alias_maps and decided to only use alias_database instead. The fix was simple.
alias_maps when commented, uses the default settings:
alias_maps = hash:/etc/aliases, nis:mail.aliases
This allows postfix to work even without explicit alias_maps settings. However the default also encumbers it with checking nis. Setting alias_maps explicitly eliminates the problem:
alias_maps = hash:/etc/aliases
Last edited by markc; 20th April 2013 at 18:58.