@CoffeeAndTech NAT loopback is for NAT, OpenVPN is not NAT so that's why it doesn't work. I think it worked before but that this option has been removed, I'm a bit unsure. I'm in the same situation...

@NovaMIT Open port 25 for the mail server, then block port 25 for everyone.

@Tom_D_Kat you must upgrade to version 2.2.3 first or it will fail

@Matze78

Matze78 wrote mschapv2 is activated by default. i have no idea what i need to setup... @Matze78 have you just enabled mschapv2? do you have an option for require mschapv2 i think you have to require...

@Matze78 I don't know windows server, but I did a test here against an l2tp server I have, I disabled mschapv2 and then I couldn't log in.. but if it's enabled on yours I don't have any more tips....