smtplib documentation of mail_options/rcpt_options does not cover key-value case

smtplib's sendmailand send_message support the arguments mail_options and rcpt_options which both take a list of ESMTP options. However, the documentation does only describe the single word case not the key-value case.

The caller may pass a list of ESMTP options (such as 8bitmime) to be used in MAIL FROM commands as mail_options. ESMTP options (such as DSN commands) that should be used with all RCPT commands can be passed as rcpt_options.

To determine the correct format, users need to read the library source code. Maybe this could directly be extended to:

The caller may pass a list of ESMTP options as strings (such as "8bitmime") to be used in MAIL FROM commands as mail_options. ESMTP options (such as DSN commands) that should be used with all RCPT commands can be passed as rcpt_options (such as "NOTIFY=SUCCESS,FAILURE").

Linked PRs

• gh-132547
• gh-142796
• gh-142797

先查看 smtplib 中關於 sendmail 和 send_message 的文件，然後將 mail_options 和 rcpt_options 的描述與函式庫原始碼進行比較。當文件清楚地描述獨立的 ESMTP 選項和鍵值選項，並提供類似 NOTIFY=SUCCESS,FAILURE 的範例時，工作即完成。