I am trying to investigate a problem with sending mail from my tiscali address to GMX addresses (separate topic). Mails are not received at GMX and no delivery failure notification is received, aka bounce message. GMX will not investigate unless they can examine the bounce message.
Using Mozilla Thunderbird on a desktop Windows PC, I can request (per message) a Return Receipt (RR) and a Delivery Status Notification (DSN). I understand that the Return Receipt could (if desired) be sent by the person receiving the mail. I assume that the DSN should be sent automatically by the transmitting Email system.
I have tiscali, GMX and Gmail accounts.
When sending a plain text test message I get the following results:
1. from tiscali (via Thunderbird) to GMX : no DSN; mail not received
2. from tiscali (via Thunderbird) to Gmail : no DSN; mail received OK, but no RR requested *1
3. from tiscali (via Thunderbird) to a wrong GMX address : no DSN
4. from Gmail to a wrong GMX address : got DSN OK from Mail Delivery Subsystem <mailer-daemon@googlemail.com>
5. from tiscali (via Thunderbird) to a wrong Gmail address : no DSN
6. from tiscali (directly from TalkTalk webmail) to GMX : no DSN; not received
*1 OK, for Gmail, "Read receipts are only available for work or school accounts, not personal Gmail accounts"
Why is the tiscali mail service not generating Delivery Status Notifications? (cases 1, 2, 3, 5 & 6)
(They are not in Junk / Spam)
