lib-storage: mail_user_get_alt_usernames() - Skip empty string values

diff --git a/src/lib-storage/mail-user.c b/src/lib-storage/mail-user.c
index 06944a2156d75856eaa0d6e6423d04c92b807bf3..e61a66b66896f21481786c4cfb563b8e7438d407 100644 (file)
--- a/src/lib-storage/mail-user.c
+++ b/src/lib-storage/mail-user.c
@@ -693,7 +693,7 @@ const char *const *mail_user_get_alt_usernames(struct mail_user *user)
        for (unsigned int i = 0; user->userdb_fields[i] != NULL; i++) {
                const char *key, *value;
                if (t_split_key_value_eq(user->userdb_fields[i], &key, &value) &&
-                   str_begins_with(key, "user_")) {
+                   *value != '\0' && str_begins_with(key, "user_")) {
                        array_append(&alt_usernames, &key, 1);
                        array_append(&alt_usernames, &value, 1);
                }