User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ro; rv:184.108.40.206) Gecko/20101026 Firefox/3.6.12 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:220.127.116.11) Gecko/20101027 Thunderbird/3.1.6 When I send a message I received two return receipt. Reproducible: Always
Which mailer returned two return receipt to you? If Thunderbird 3.1, it's probably due to Bug 598027. If your friend is Tb user, ask your friend to change Tb's setting as follows. > Return receipts : Always send at any option => Always ask me
Status: UNCONFIRMED → RESOLVED
Last Resolved: 7 years ago
Resolution: --- → INCOMPLETE
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