How to restrict people to send emails from my email domain to reduce SPAM. We are using postfix in ubuntu. Is there any parameter which I can configure in main.cf to achieve this?
Any help will be really appreciated. Thanks
How to restrict people to send emails from my email domain to reduce SPAM. We are using postfix in ubuntu. Is there any parameter which I can configure in main.cf to achieve this?
Any help will be really appreciated. Thanks
This is done by implementing different security solutions:
Of course nothing can guarantee that all MTAs in the world will respect any or all of those instructions, but implementing them is definitely a step in the right direction and will probably solve your problem.
Note that I noticed, from your previous question, that your server doesn't have a PTR record and this will negatively affect your message deliverability, possibly causing them to be filtered as junk or rejected.