- // Construct a fun message id
- cprintf("Message-ID: <%s", mid);
- if (strchr(mid, '@')==NULL) {
- cprintf("@%s", snode);
- }
- cprintf(">%s", nl);
+ // Make the message ID RFC2822 compliant
+ cprintf("Message-ID: <%s%s%s>%s", // put it in angle brackets
+ mid,
+ (strchr(mid, '@') ? "" : "@"), // if there is no domain part,
+ (strchr(mid, '@') ? "" : snode), // tack on ours.
+ nl
+ );