I’ve come across an issue where one of my clients suddenly stopped receiving emails from his website contact form. Checking various blacklists can sometimes result in the solution:
- https://www.spamhaus.org/lookup/
- http://www.abuseat.org/lookup.cgi
However, in this case, the client manages his own domain and mail. The zone file for the domain in question looks like this:
- A “mail” record = The IP of the website server
- MX “@” record = mail.<clientdomain>.com
The ultimate solution was to go into cPanel and select Email >> MX Entry >> Domain (client domain) >> Email Routing >> Remote Mail Exchanger.