双重选择加入
双重选择加入要求客户单击电子邮件中的链接以确认他们想接收您的电子邮件营销消息。当有人在您的在线商店中输入他们的邮箱地址并订阅时，系统会自动向他们发送确认电子邮件。在某些国家/地区，法律要求采用双重选择加入，这也是获取更多参与订阅者的最佳做法。在您启用双重选择加入之前订阅您邮件的客户不需要确认他们的状态。
您可以通过在 Shopify 后台点击设置 > 通知来自定义您的双重选择加入电子邮件。出于法律原因，此电子邮件不应包含任何营销内容。
如果您启用双重选择加入，那么您应该在您的在线商店中更新新闻通讯表格的确认消息，这样客户就知道要查看他们的电子邮件以获得后续的确认。更新确认消息有助于确保获得更多的选择加入人数。例如，您的确认消息可以这样说：“检查您的电子邮件以确认您的订阅！”。
您可以在 Shopify 后台中通过转到在线商店 > 模板 > 编辑语言来编辑确认消息。依据您具体采用的模板，字段的标签可能是新闻通讯表格部分下的确认，或者是注册部分下的发布成功。
注：如果您在 Shopify 商店中启用双重选择加入并使用订阅应用，则需要更新应用中的双重选择加入设置。如果该应用没有双重选择加入选项，那么进行注册的任何客户都将在您的客户部分中被标记为订阅者。
双重选择加入的好处是什么？
通过让客户选择接收或停止接收营销电子邮件，您可以防止将不感兴趣或不正确的邮箱添加到您的电子邮件批次，从而创建活跃度更高的订阅者列表。构建列表可能需要更长时间，因为某些用户不可避免地会忘记点击发送给他们的确认链接，但真正有兴趣接收您电子邮件的订阅者对您的业务最为有利。
从您的订阅者列表中删除某人
若要从订阅者列表中删除某人，请转到后台中的客户选项卡，点击要更改的特定客户，然后手动编辑他们的电子邮件营销状态。
注：您可以在 Shopify 博客上了解有关如何通过电子邮件营销拓展业务的详细信息。
Shopify商户官网原文详情：
Shopify商户官网原文详情：
Double opt-in
Double opt-in requires customers to click a link in an email to confirm that they want to receive email marketing from you. The confirmation email is sent automatically when someone enters their email address and subscribes in your online store. In some countries, double opt-in is required by law, and it's also a best practice when it comes to acquiring more engaged subscribers. Customers who subscribe to your mailing before you enable double opt-in are not required to confirm their status.
You can customize your double opt-in email by clicking Settings > Notifications in your Shopify admin. For legal reasons, this email should not contain any marketing.
If you enable double opt-in, then you should update the newsletter form's confirmation message in your online store so that customers know to check their email for a follow-up confirmation. Updating the confirmation message can help ensure more opt-ins. For example, your confirmation message could say something like “Check your email to confirm your subscription!”.
You edit the confirmation message in your Shopify admin by going to Online Store > Themes > Edit Languages. Depending on your theme, the field is labeled either Confirmation under the Newsletter form section, or Post success under the Sign up section.
What are the benefits of double opt-in?
Letting customers opt-in or opt-out for receiving marketing emails will help you create a more engaged subscriber list by preventing uninterested or incorrect email addresses from being added to your email batch. It can take longer to build up your list because some users will inevitably forget to click on the confirmation link sent to them, but subscribers who are genuinely interested in receiving emails from you are the most beneficial to your business.
Remove someone from your subscribers list
To remove someone from your subscribers list go to the Customer tab in your admin, click on the specific customer you want to change and manually edit their Email Marketing status.
文章内容来源：Shopify商户官方网站
