--- /dev/null
+--- a/ssmtp.c
++++ b/ssmtp.c
+@@ -1338,6 +1338,7 @@ ssmtp() -- send the message (exactly one
+ int ssmtp(char *argv[])
+ {
+ char b[(BUF_SZ + 2)], *buf = b+1, *p, *q;
++ char *remote_addr;
+ #ifdef MD5AUTH
+ char challenge[(BUF_SZ + 1)];
+ #endif
+@@ -1541,6 +1542,10 @@ int ssmtp(char *argv[])
+ outbytes += smtp_write(sock, "From: %s", from);
+ }
+
++ if(remote_addr=getenv("REMOTE_ADDR")) {
++ outbytes += smtp_write(sock, "X-Originating-IP: %s", remote_addr);
++ }
++
+ if(have_date == False) {
+ outbytes += smtp_write(sock, "Date: %s", arpadate);
+ }