perfect-server-ubuntu-14.10-with-apache-php-myqsl-pureftpd-bind-postfix-doveot-and-ispconfig

Is the port blocked for incoming or outgoing traffic or for both?

 

If your provider does not allow port 25 incoming, then your server will not be able to receive any external emails. So you can only use it as internal server that fetches e.g. mail by imap from a gmail account. If you want to use it as real mailserver, then you better get a small virtual server in a datacenter and dont run the serevr at home.

 

You can not run a normal mailserver thats shall be able to receive emails on a connection that has port 25 closed. The reason is that all external servers, e.g. gmail, yahoo or hotmail will try to connect your server on port 25 to deliver the email, if they cant reach your server on that port, mail delivery will fail.

 

pop is not incoming email, pop is a protocol to fetch emails. The perfect server guide enables pop on port 995 by default, so if you want to use that then all you have to do is to type in this port in your mailclient. Same for imap.

if your provider blocks port 35 outgoing for smtp, then you have to configure the smtp server of your provider under System > server config as relay server as other mailservers expect to ve contacted on port 25.