diff --git a/src/mailers.c b/src/mailers.c
index 3df02f0..4138bae 100644
--- a/src/mailers.c
+++ b/src/mailers.c
@@ -195,7 +195,7 @@
 		goto error;
 
 	{
-		const char * const strs[4] = { "EHLO ", p->email_alert.myhostname, "\r\n" };
+		const char * const strs[4] = { "HELO ", p->email_alert.myhostname, "\r\n" };
 		if (!add_tcpcheck_send_strs(&alert->rules, strs))
 			goto error;
 	}