> >> sending mail is not a standard POP feature, and it's not what sendmail >> uses. >> >> Your choices for limiting access to sendmail include: >> 1. Limiting the addresses it listens to. You don't want it listening >> to public IP addresses. >> 2. Using /etc/hosts.{allow,deny} to control what addresses sendmail >> accepts connexions from. >> 3. Using an external firewall to control who can connect to your mail >> server. This is appropriate, for example, when you use ADSL and have a >> "hardware" router manage your internet connexion. You can also choose >> to use a PC in this role (I do it with an HP Vectra Pentium II running >> Debian and Shorewall). >> 4. Using netfilter on your mail server as above. See www.netfilter.org >> and "man iptables." >> 5. Sendmail (probably) has its own additional means of controlling who >> can connect: I use Postfix, and for certain and sure Postfix has. >> > I'd like to add another idea to the list. You can use DRAC (Dynamic > Relay Authorization Control) to dynamically update your SMTP relay > rules. We used to use this at one of my previous employers. You're users > must make a POP or IMAP email check, and then DRAC will dynamically add > a rule to your relay access filters for them. > > http://mail.cc.umanitoba.ca/drac/ > > -Shawn Hi Shawn Thanks that looks like the perfect solution, I will give it a try. Regards Denis _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos