I am getting this issue on reverse dns on diagnosis:
Reverse DNS is not correctly configured for IPv4. Some emails may fail to get delivered or be flagged as spam.
Current reverse DNS: dynamic-adsl-xx-xxx-xxx-xxx.client.isp.com Expected value: mydomain You should first try to configure reverse DNS with mydomain in your internet router interface
I am using a router with openwrt, how to configure it inside the openwrt?