ISPconfig 3 - Postfix - warning: dict_nis_init: NIS domain name not set - NIS lookups

Hi,

Anybody who can confirm this fix - please remember, its an ISPconfig Server:

Problem:
warning: dict_nis_init: NIS domain name not set - NIS lookups disabled

Solution maybe?:
Nov 21 10:21:13 web postfix/smtpd[30732]: warning: dict_nis_init: NIS
domain name not set - NIS lookups disabled

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
or
alias_maps = hash:/etc/mail/aliases nis:mail.aliases

Then, disable NIS lookups (as root):

# postconf -e alias_maps=hash:/etc/aliases
or
# postconf -e alias_maps=hash:/etc/mail/aliases

The exact command depends on "postconf | grep nis:" output


Looking forward to hear from anyone