We have recently changed our ISP, I have changed the
mailserver DNS 'A' records for our domain name to point to the new external static IP address assigned to the router by the new ISP (the MX record points to
mail.<mydomain> as always) but I am not getting any email (though sending email works). Do I just have to wait will the change is reflected in DNS caches? I am slightly concerned because I can connect to the web email service made visible through the new router which suggests that the
mail.<mydomain> static I.P. address change has happened.
mxtoolbox.com reports an 'A' type DNS record pointing to the static IP address of the router, but clicking on smtp diag on that web page results in :
Timeout occurred due to inactivity.
Port 25 is not open on
mail.<mydomain> (presumably blocked by the router) should it be?
Have I missed something?