Topic: Copy /lib/lib[nss_*,resol] to postfix chroot for DNS resolution ?
EDIT : this might be caused by /etc/postfix/chroot-update scrit missing. I am continuing to investigate.
I wasn't able to have policyd whitelist some domains (by name -> dns), and
looking in the logs, it seemed that the dns resolution was not done by smtpd.
( connect from unknown[ip] / client=unknown(ip) etc...)
Googling around gave me something that seems to work well : copying the
/lib (lib64 in my case) resolv/nss related libs in the postfix chroot (/var/spool/postfix).
Perhaps this is something which is also valid for other distros and that should be
included in the functions/postfix.sh script
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