Ops

Recently, I had to help a friend with email problems. So I thought I should write a little blog post about the thought process of how I solved it in the first place. So you have a small business, and suddenly something changed, and something is fishy when it comes to emails. In my experience, most of the time, the following cases need to be checked: Emails do not arrive at their destination Emails did not land in our inbox IP is blocked by a security solution Emails do not arrive at their destination Email is an old textual protocol. In the early email-sending time, there where no encryption or validation supporting it. I can still send an email from the command line if I want and say anything about my identity. (Side note spammers often use this technique for sending ransom/blackmail emails.) ...