New submission from Dmitry Goldenberg <dgoldenberg123@gmail.com>: Is there a reliable way to certify (ensure, track) the delivery of an email message when using smtplib? For example: Disposition-Notification-To message header which enables the e-mail reader of the recipient to send confirmation e-mail when the recipient opens the message for the first time. That e-mail reader program must support this functionality. Return-Receipt-To message header which enables the e-mail server of the recipient to send confirmation e-mail when the original e-mail gets received by that server. However, most newer e-mail servers do not support Return-Receipt-To header. Are these message headers at all reliable? The request is to enhance the documentation to provide an example of how to track a message delivery. Conversely, if it's plain not possible, the request is to state that explicitly in the docs. ---------- assignee: docs@python components: Documentation messages: 384600 nosy: dgoldenberg123, docs@python priority: normal severity: normal status: open title: smtplib: recipe for certifying message delivery type: enhancement versions: Python 3.7 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue42859> _______________________________________