參考:
- https://docs.sendgrid.com/ui/analytics-and-reporting/email-activity-feed
- https://sendgrid.com/blog/the-nine-events-of-email/
- https://www.activecampaign.com/blog/email-bounce
- https://www.socialmediatoday.com/content/8-reasons-emails-bounce
原文:
- Processed:
- Requests from your website, application, or mail client via SMTP Relay or the API that SendGrid processed.
- 當SendGridAPI新增將觸發此事件,(第一個事件),除非信件被判斷為dropped。
- Clicks:
- Whenever a recipient clicks one of the Click Tracked links in your email. In the Email History, SendGrid displays the date, time, and the URL for the link that was clicked.
- 信件連結被點擊了。(理論上應該是收到信才有可能觸發)
- Delivered
- The accepted response generated by the recipients' mail server.
- 此事件不保證接收伺服器接收到信件,只是標記已經傳送信件。
- 後續還有相關狀態回報。
- Delivered、Bounced、Blocked、Deffered
- Opens
- The response generated by a recipient opening an email.
- 信件被打開了。(理論上應該是收到信才會打開)
- Unsubscribes
- Whenever a recipient unsubscribes from your emails.
- Group Unsubscribes ¨C18C¨C19C¨C20C¨C21C¨C22C¨C23C¨C24C¨C25C¨C26C¨C27C¨C28C¨C29C¨C30C¨C31C¨C32C
- 垃圾郵件過濾器
- 被管理者擋掉(Individual Server Administrators)
- 主題出現「免費」、「訂閱」、類似詐騙信件、只有主旨沒有內容等。
- Subject starts with “Free”
- Contains, “If you want to subscribe...”
- Offers a full refund
- Claims you have provided permission
- “See for yourself”
- Subject is all capitals
- Message is 0% to 10% HTML
- HTML title contains no text
- “Free Preview”
- 自然消亡(Natural Database Decay):企業,離職或是網域消失。
- 臨時無法交付(Temporary Un-deliverables):信箱滿了,夾黨太大,臨時狀況拒絕電子郵件,會發生軟退回(退回重送)。
- 無效地址(Invalid Addresses):地址無效,發生硬退回(不重送)。
- 不小心打錯或是故意填錯。
- 發信人信譽(Sender Reputation):網域或郵件不被信任。
- 列入黑名單ip(Blacklisted IP Ranges)
- 不斷發展業界標準(evolving industry standards)
- When your IP address has been blocked by an ISP or messaging organization. Blocks are less severe than bounces and do not result in permanent suppressions: subsequent sends to blocked email addresses are not automatically suppressed.
- 當你的IP位置被ISP或 messaging organization 【block】。
- 【Block】不像【bounce】那麼嚴重,不會導致永久禁止。
- 後續發送的已被block的信件也不會自動禁止。
- Whenever a recipient marks your email as spam and their mail server tells us about it.
- 收件人將您的email標記為垃圾郵件,他們的mail server回傳告知。
筆記:自己依流程定義
- processed:已處理
- delivered:已送達
- open:開啟郵件
- click:開啟信件連結
- deferred:異常重送
- bounce:駁回重送'--rejected by the receiving mail server
- blocked:駁回
- dropped:被排除
- success:發送成功
- fail:發送失敗
正常流程:processed-->delivered(-->open開啟信件表示受件人有讀取到信)