I followed "The Perfect Server -Debian Lenny (Debia 5.0) [ISPConfig 2]" up to item 13: Courier IMAP / POP3. When I run 'mkimapdcert', the following error message occurred. When I restart the server, it seems there is no error during boot up. Please advise if the error message will affect the functionality of the courier server. Thanks
Thanks Falko. I found that /usr/lib/courier/imapd.pem was softlink to /etc/courier/imapd.pem. (same for pop3d.pem) I tried the following: rm both imapd.pem files, then run 'mkimapdcert'. Now error message. imapd.pem was generated in /usr/lib/courier/. Then I mv the pem file to /etc/courier/ and re-create the softlink. Are these steps OK. I am setting up this mail server for internal LAN use (not open to the internet). Is setting up courier SSL server of any use? Whenever I connect to the mail server using an email client (outlook, thunderbird), a message pop up saying that the certificate is not from a trusted source. How can I let the email client know that the certificate can be trusted and avoid the pop up message? Thanks in advance.
I think so. I don't think you need SSL inside your LAN (unless you don't trust the users in your LAN). You'd have to buy a certificate from a trusted CA such as Verisign or InstantSSL.