Incredible. The usual response to "should I host my own email" is "don't do it; you'll get hacked."
Three questions:
1. Have you heard of this complaint?
2. Do you use a home ISP connection, or a commercial ISP connection? A "home ISP connection" here usually comes with a dynamic IP address; you can't get your hands on a static address without paying a very large amount monthly or getting a commercial connection.
3. You say "I don't expose anything to the public internet unless absolutely necessary." Is your ip address via your domain name one of those "necessary" items?
Three questions:
1. Have you heard of this complaint?
2. Do you use a home ISP connection, or a commercial ISP connection? A "home ISP connection" here usually comes with a dynamic IP address; you can't get your hands on a static address without paying a very large amount monthly or getting a commercial connection.
3. You say "I don't expose anything to the public internet unless absolutely necessary." Is your ip address via your domain name one of those "necessary" items?