[ILUG] postfix whitelist smtp servers
gmccullagh at gmail.com
Thu Feb 14 14:52:44 GMT 2008
I'm looking to whitelist a few smtp servers which ours should accept mail
from while blocking all others. We're using postfix.
The first way I thought of was to use:
smtpd_recipient_restrictions = ..., check_client_access hash:/etc/postfix/access, ...
and then create the map with something like:
??? 401 try again later
except that the ??? is the problem. I can't figure out how to specify all
networks. A /8 is easy with eg. "127. " but to ban everyone would require
254 of those lines which can't be right.
I could perhaps allow certain HELO hostnames, but the IP address seems the
more concrete thing to block by.
I'm sure I must be missing something obvious here. Does anyone know the
best way to do this?
Thanks in advance,
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