Al Bundy

CMail has these features.

The RCTP TO command does not appear in the e-mail at all, it's part of the SMTP session. The reply-to header is different and will be in the e-mail headers, but not in the format above. NOTIFY=SUCCESS relates to Delivery Status Notification, and is controlled using the -dsn option. If you're wanting a response from your (or an upstream) SMTP server to verify the e-mail was relayed or delivered, -dsn is what you're looking for.

The RCTP TO command does not appear in the e-mail at all, it's part of the SMTP session. The reply-to header is different and will be in the e-mail headers, but not in the format above. NOTIFY=SUCCESS related to Delivery Status Notification, and is controlled using the -dsn option. If you're wanting a response from your (or an upstream) SMTP server to verify the e-mail was relayed or delivered, -dsn is what you're looking for.

E-mail can be written to file using the -file option and sent using -emailfile. https://www.inveigle.net/cmail/usage#_mandatory_options_mode_selection

I used CMail to generate .eml files. It can send them too.