elastix aapanel is mucuh great, can make hosting easy going. assumed it's not difficult to host mailserver, but ISP blocked port 25 and 110. Any solution? Thanks!
duy13 I believe that normal ISP will block outgoing packets to port 25, they do not block incoming packets to port 25. Please check, open a service at port 25 and check port listener
[deleted] https://www.noip.com/blog/2013/03/26/my-isp-blocks-smtp-port-25-can-i-still-host-a-mail-server/ could be a good read.