I have a nethserver working as domain controller.
Lets say:
External domain: example.com
Domain controller: ad.example.com
Email server: mail.example.com
Wordpress for my http website.
Then i have SOGo as email server. My isp blocks port 25.
Im able to send email internally but not to the outside. Also wont receive any email.
MX record + autodiscover dns records are created. Im able to add an account into outlook.
Would you please explain this sentence? Outgoing? Incoming? On the server? Or on a public/internet client?
25 is a standard port for every public mail server… Probably this block could kill the server availability.
You could, in theory, work around a restriction that outbound traffic on port 25 is blocked, generally by using a smarthost. But if inbound traffic on port 25 is also blocked, and you can’t convince your ISP to unblock it (perhaps by changing to a business plan), you aren’t going to be able to have an Internet mail server at home. Period. It just isn’t going to work, as port 25 is what the rest of the internet is going to try to reach.
Suggest you consider installing Neth in a remote VPS–I’ve been satisfied with Contabo, and their prices seem pretty reasonable.