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The following error occurs during the use of Postfix, we can specify the network protocol as IP4. send-mail: warning: inet_protocols: IPv6 support is disabled: Address family not supported by protocol
send-mail: warning: inet_protocols: configuring for IPv4 support only
postdrop: warning: inet_protocols: IPv6 support is disabled: Address family not supported by protocol
postdrop: warning: inet_protocols: configuring for IPv4 support only View current inet_protocols # /usr/sbin/postconf | grep inet_protocols inet_protocols = all
Modified to: # vi /etc/postfix/main.cf inet_protocols = all Change inet_protocols = ipv4
Then restart and go!
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