Few days ago I have installed Hmail on my server, with pretty default config. Today i saw, that this e-mail server is not working for my local e-mail account providers (my country's local yahoo versions etc), emails sent by my server are only properly received by gmail. Is there anything additional that i need to setup on my email server in order to send e-mails, so they can be properly received everywhere?
Edit: I just found out that my emails were sent, but rejected due to anti-spam. What can I do about it?