Ejabber2.1.3 配置admin注册用户 ，禁止普通用户注册

打开：ejaberred.cfg

修改下面这两行 ，其中 register_from 为新加入

%% To disable in-band registration, replace 'allow' with 'deny'.
{access, register, [{allow, admin}]}.
{access, register_from, [{allow, admin}]}.

修改mod_register 模块 为：

{mod_register, [
          %%
          %% After successful registration, the user receives
          %% a message with this subject and body.
          %%
          %% {welcome_message, {"Welcome!",
          %%             "Hi.\nWelcome to this XMPP server."}},
          %%
          %% When a user registers, send a notification to
          %% these XMPP accounts.
          %%
          %%{registration_watchers, ["admin1@example.org"]},
          {access_from, register_from}
         ]},