diff --git a/include/libbb.h b/include/libbb.h
index 2cc146631..f12800f53 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -795,7 +795,6 @@ void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
 int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
 
 char *safe_gethostname(void) FAST_FUNC;
-char *safe_getdomainname(void) FAST_FUNC;
 
 /* Convert each alpha char in str to lower-case */
 char* str_tolower(char *str) FAST_FUNC;
diff --git a/libbb/safe_gethostname.c b/libbb/safe_gethostname.c
index bdb989631..cac99ae03 100644
--- a/libbb/safe_gethostname.c
+++ b/libbb/safe_gethostname.c
@@ -50,25 +50,3 @@ char* FAST_FUNC safe_gethostname(void)
 	uname(&uts);
 	return xstrndup(!uts.nodename[0] ? "?" : uts.nodename, sizeof(uts.nodename));
 }
-
-/*
- * On success return the current malloced and NUL terminated domainname.
- * On error return malloced and NUL terminated string "?".
- * This is an illegal first character for a domainname.
- * The returned malloced string must be freed by the caller.
- */
-char* FAST_FUNC safe_getdomainname(void)
-{
-#if defined(__linux__)
-/* The field domainname of struct utsname is Linux specific. */
-	struct utsname uts;
-	uname(&uts);
-	return xstrndup(!uts.domainname[0] ? "?" : uts.domainname, sizeof(uts.domainname));
-#else
-	/* We really don't care about people with domain names wider than most screens */
-	char buf[256];
-	int r = getdomainname(buf, sizeof(buf));
-	buf[sizeof(buf)-1] = '\0';
-	return xstrdup(r < 0 ? "?" : buf);
-#endif
-}
diff --git a/mailutils/sendmail.c b/mailutils/sendmail.c
index aa381c60f..c426e9d85 100644
--- a/mailutils/sendmail.c
+++ b/mailutils/sendmail.c
@@ -118,7 +118,7 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
 	char *opt_from;
 	char *s;
 	llist_t *list = NULL;
-	char *domain = sane_address(safe_getdomainname());
+	char *host = sane_address(safe_gethostname());
 	unsigned nheaders = 0;
 	int code;
 
@@ -222,8 +222,9 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
 	}
 
 	// we should start with modern EHLO
-	if (250 != smtp_checkp("EHLO %s", domain, -1))
-		smtp_checkp("HELO %s", domain, 250);
+	if (250 != smtp_checkp("EHLO %s", host, -1))
+		smtp_checkp("HELO %s", host, 250);
+	free(host);
 
 	// perform authentication
 	if (opts & OPT_a) {