Use .yggmail TLD

README.md

@@ -12,7 +12,7 @@ Yggmail is a single-binary all-in-one mail transfer agent which sends and receiv
 * All mail exchange traffic between any two Yggmail nodes is always end-to-end encrypted without exception;
 * Yggdrasil and Yggmail nodes on the same network are discovered automatically using multicast or you can configure a static Yggdrasil peer.
 
-Email addresses are based on your public key, like `neilalexander@e3bf4665ae1ff714e0112040af8ddfc8e4b664a28e4afa40746e13952550f9ef`. 
+Email addresses are based on your public key, like `neilalexander@e3bf4665ae1ff714e0112040af8ddfc8e4b664a28e4afa40746e13952550f9ef.yggmail`. 
 
 ## Quickstart
 

cmd/yggmail/main.go

@@ -92,7 +92,7 @@ func main() {
 			panic(err)
 		}
 		fmt.Printf("Created user %q\n", *createuser)
-		fmt.Printf("Email address will be %s@%s\n", *createuser, hex.EncodeToString(pk))
+		fmt.Printf("Email address will be %s@%s%s\n", *createuser, hex.EncodeToString(pk), smtpserver.TLD)
 		os.Exit(0)
 	}
 

internal/smtpserver/session.go

@@ -5,10 +5,15 @@ import (
 	"strings"
 )
 
+const TLD = ".yggmail"
+
 func parseAddress(email string) (string, string, error) {
+	if !strings.HasSuffix(email, TLD) {
+		return "", "", fmt.Errorf("invalid TLD")
+	}
 	at := strings.LastIndex(email, "@")
 	if at == 0 {
 		return "", "", fmt.Errorf("invalid email address")
 	}
-	return email[:at], email[at+1:], nil
+	return email[:at], strings.TrimSuffix(email[at+1:], TLD), nil
 }