On Thursday 14 August 2003 00:58, remote wrote:
Hi !
I administer a small network of Linux and Windows boxes, using a SuSE 8.0 Professional box as router, firewall and mail server. Everything is running fine right now, except for one little thing :
I want my users to connect to my mail server from outside my domain, so that they can send e-mails using their mail accounts on my server. Right now, they can download their mail from outside via POP3, but are not allowed to send any mails, unless the mail is addressed to a local mail address. What do I have to do so that my users can use their local accounts to send mails to non- local addresses. For security and anti- spam reasons I´d like to implement some sort of POP3 before SMTP- policy so that only authenticated users can send mails. I use Sendmail 8.12.2, no modifications.
Any suggestions ?
Thanks
Google up "popauth" which is a modification for sendmail. Enforce apop shared secrets too (virtually all mailers support this) so that real passwords are not transmitted in pop3 sessions. For users with even a mild degree of sophistication putty can be used to establish a ssh session and forward port 25 to your mail server from your gateway/firewall or where ever. But this may be more trouble than its worth. -- _____________________________________ John Andersen