diff --git a/src/tool_help.c b/src/tool_help.c
index 81ac89726..bd3cbb8a9 100644
--- a/src/tool_help.c
+++ b/src/tool_help.c
@@ -126,9 +126,9 @@ static const char *const helptext[] = {
   " -L, --location      Follow redirects (H)",
   "     --location-trusted like --location and send auth to other hosts (H)",
   " -M, --manual        Display the full manual",
-  "     --mail-from FROM  Mail from this address",
-  "     --mail-rcpt TO  Mail to this receiver(s)",
-  "     --mail-auth AUTH  Originator address of the original email",
+  "     --mail-from FROM  Mail from this address (SMTP)",
+  "     --mail-rcpt TO  Mail to this/these addresses (SMTP)",
+  "     --mail-auth AUTH  Originator address of the original email (SMTP)",
   "     --max-filesize BYTES  Maximum file size to download (H/F)",
   "     --max-redirs NUM  Maximum number of redirects allowed (H)",
   " -m, --max-time SECONDS  Maximum time allowed for the transfer",