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I am using Thunderbird 17.0.6 on Windows 7 x64. I use it to manage two e-mail accounts. I wanted to unsubscribe from a mailing list, so I sent an e-mail to an automatic service in order to do so.

I selected the address that was subscribed in the from drop-down menu in Thunderbird's "write" window.

Quickly after sending the message, I received an error on my other e-mail account saying that I couldn't unsubscribe since that account wasn't subscribed (it's not).

Why does this happen? Why did the mailing list manager interpret my e-mail as sent from another address than the one chosen in the from field?

Note: I didn't edit my reply-to account settings.

share|improve this question
Did you double-check in the Sent folder? – unor Jun 14 '13 at 18:39
Yes, the message appears in both of my sent folders. I can, however, confirm that it didn't actually get sent twice. – Andrei Bârsan Jun 14 '13 at 19:25

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