Hello- If you firewall smtp to only accept connections from your 3 internal hosts, you won't get any inbound email from outside since external hosts can't reach the smtp server. Outbound mail will work ok from that server or the 3 firewall allowed internal hosts. POP is for retrieving email from the server. If your goal is to have the CentOS box serve as a mail gateway for inbound & outbound email, you'd use /etc/mail/access to control how sendmail handles connections from hosts. In that file you'd give your 3 internal hosts permission to relay mail through that server. On 1/14/07, Denis Croombs <denis at croombs.org> wrote: > > I have a Centos server and I want to only accept mail for the local users > from 3 mail servers, but I still want the users to be able to send emails > through this server, If I firewall the SMTP port to my 3 mail servers is > there any way users will be able to still send via the main POP server ? > (currently using Sendmails SMTP-Auth) > > Thanks > > Denis > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070114/f7633590/attachment-0005.html>