[Merge] lp:~coolyashish/postorius/add_email_address_in_settings into lp:postorius

[Abhilash Raj]

We don't want to send confirmation email from the user's email, it should be from listowner or some other address (like noreply at domain or something).
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https://code.launchpad.net/~coolyashish/postorius/add_email_address_in_settings/+merge/252939
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