Google 已经停止支持“低安全性应用访问”选项，因为这种方式存在安全风险。为了解决这个问题，如果你需要通过 Gmail 发送邮件，可以使用以下更安全的方法：

1. 使用“应用专用密码”
   Google 建议用户通过 应用专用密码 来访问 Gmail，而不是直接使用账户密码。这种方式更安全，且不受限制。

步骤如下：

访问 Google 账户安全设置。
确保已启用“双重验证”功能。如果未启用，请先设置双重验证。
启用双重验证后，点击“应用专用密码”。
选择用于发送邮件的应用和设备类型，生成一个应用专用密码。
在邮件发送的程序或脚本中，使用这个应用专用密码代替 Gmail 密码。

地址 https://myaccount.google.com/apppasswords

通过subreddit的评论机器人自动评论置顶

步骤 1: 打开 subreddit 的管理页面
进入你管理的 subreddit。
在右上角找到“Mod Tools”按钮，并点击进入。
在左侧的导航栏中，找到 "Wiki" 部分，并点击 "Wiki pages"。
步骤 2: 创建 config/automoderator 页面
在 "Wiki pages" 页面上，查找 config/automoderator。
如果该页面不存在，你会看到提示 “config/automoderator does not exist. Create a wiki page from this URL”。
点击这个提示中的 URL，或者在地址栏直接输入 https://www.reddit.com/r/YourSubreddit/wiki/config/automoderator（把 YourSubreddit 替换为你的 subreddit 名字），然后按下回车。
你会进入一个新页面，可以在此创建 AutoModerator 规则。

---
type: submission
comment: |
  Hello, {{author}}! TEXT OF COMMENT

  TEXT OF COMMENT

  TEXT OF COMMENT
comment_stickied: true
---

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sudo sed -i 's|baseurl=http://mirrors.linode.com/centos/\$releasever/os/\$basearch/|baseurl=http://mirrors.aliyun.com/centos/7/os/x86_64/|g' /etc/yum.repos.d/CentOS-Base.repo

sudo sed -i     's|baseurl=http://mirrors.linode.com/centos/\$releasever/updates/\$basearch/|baseurl=http://mirrors.aliyun.com/centos/7/updates/x86_64/|g' /etc/yum.repos.d/CentOS-Base.repo

sudo sed -i 's|baseurl=http://mirrors.linode.com/centos/\$releasever/extras/\$basearch/|baseurl=http://mirrors.aliyun.com/centos/7/extras/x86_64/|g' /etc/yum.repos.d/CentOS-Base.repo

sudo sed -i 's|baseurl=http://mirrors.linode.com/centos/\$releasever/centosplus/\$basearch/|baseurl=http://mirrors.aliyun.com/centos/7/centosplus/x86_64/|g' /etc/yum.repos.d/CentOS-Base.repo

还有很多规则 例如设置仅仅允许发图片,或者仅仅视频等等.
https://www.reddit.com/r/modguide/wiki/contentcontrol/#wiki_only_allow_link_posts_.2F_no_text.2Fvideo.2Fimage_posts_.28etc..29

Limiting post types with Content Controls and AutoMod
Images
Only allow image posts (direct uploads only)
Only allow image posts (including hosting sites)
Only allow text posts and image posts (direct uploads only)
Don't allow image posts (including hosting sites)
Videos
Only allow video posts (direct uploads only)
Only allow video posts (including hosting sites)
Don't allow link posts to video hosting sites
Don't allow video posts (direct upload+hosting sites)
Images & Videos
Only allow image and video posts (direct uploads only)
Only allow image and video posts (including hosting sites)
Don't allow image and video posts (including hosting sites)
Links
Only allow link posts / No text/video/image posts (etc.)
Don't allow link posts
Only allow Reddit links / no external links
Don't allow links / No links
Only allow links to specific domains
Don't allow links to specific domains
Only allow crossposts
Don't allow crossposts
Misc.
Only allow polls
Where to put the AM rule