Today, Postmark released an update that adds official support for tags in its SMTP service. Tags allow users to categorize their messages for sorting and searching later. With this feature, users can search their activity feed by tag and segment campaign statistics using open tracking. The new feature enables users to add specific tags to their messages, such as product-orders or password-resets, making it easier to find and manage messages. Searching for messages by tag is now possible through the Messages API, which returns a list of matching messages with the specified tag. This update aims to help keep messages organized and make them more easily searchable.