tcprules

• Info: http://www.fehcom.de/ipnet/ucspi-tcp6/tcpserver.html  http://cr.yp.to/ucspi-tcp/tcprules.html

This is my tcprules file:

> more /home/vpopmail/etc/tcp.smtp

0.0.0.0:allow,RELAYCLIENT="",RBLSMTPD="",GREETDELAY="0"
xxx.xxx.xxx.xxx:allow,RELAYCLIENT="",RBLSMTPD="",GREETDELAY="0"
10.0.0.:allow,RELAYCLIENT="",RBLSMTPD="",GREETDELAY="0"
127.:allow,RELAYCLIENT="",RBLSMTPD="",GREETDELAY="0"
:allow

As you can see, the localhost, the internal subnet 10.0.0., and the external server's IP are allowed to use the MTA as a relay (RELAYCLIENT=""), have rblsmtpd switched off (RBLSMTPD=""), and does not face a GREETDELAY (simply replace with SMTPD_GREETDELAY if you are using the delay before smtpd).

All other clients are allowed to send us emails (allow:), will face a GREETDELAY specified in the qmail-smtpd run script, and are not allowed to use our MTA as a relay.