Check /etc/mailips permissions:
Code:
# ls -lah /etc/mailips
It should show the following:
# ls -lah /etc/mailips -rw-r----- 1 root mail 0 Mar 11 21:40 /etc/mailips
If it does not show root:mail for ownership, then fix that:
# chown root:mail /etc/mailips
If it doesn’t show 640 for file permissions, fix that:
# chmod 640 /etc/mailips
If it does have the right ownership and permissions, then next check the file isn’t set to be immutable:
# lsattr /etc/mailips
It might look like the following if it is okay:
# lsattr /etc/mailips -------A----- /etc/mailips
Or below if it is unwritable
# lsattr /etc/mailips ----i--------e- /etc/mailips
An uppercase A is fine. If it has a lowercase i or a lowercase a, then it isn’t fine, and those need removed:
# chattr -ia /etc/mailips
Now it looks like
# lsattr /etc/mailips -------------e- /etc/mailips