Hello I have installed a mail server using this tuturial. The problem I'm having is that I can't send mail via client(outlook, thunterdbird). http://www.howtoforge.com/perfect-server-ubuntu-12.04-lts-apache2-bind-dovecot-ispconfig-3 I have installed roundcube instead of squrelMail. My setup is the folowing: The thing is, that I can send and recive e-mails from roundcube to an gmail, yahoo etc account. The problem is when I send a mail from a client(outlook, thunterdbird). -When I'm adding the account to outlook I have to put the local ip adress (mail server 192.168.10.22) of the server into the incoming & outgoing SMTP server. It cannot find the incoming and outgoing mail server(mail.example.com). -I have put the MX record at my isp to point to my ip. If I do na "nslookup" or "dig mx" it returnes the correct ip(exp. 123.123.123.123). -On my firewall I have forwarded port 25 to my internal ip (mail server 192.168.10.22). -Localy I can telnet to 192.168.10.22 over port 25. Do I need a record on my local DNS server for mail.example.com pointing to 192.168.10.22? I am very grateful for any help
what error is in your /var/log/mail.log when you get the client error? Please post that log and postfix main.cf
