User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36 Steps to reproduce: I found the urgent bug in Thunderbird ver 31. In order to repeat this bug you should do the following steps. 1. Prepeare a list of emails separeted with commas and "newline" delimeters for example: email@example.com,firstname.lastname@example.org,email@example.com, firstname.lastname@example.org,email@example.com, firstname.lastname@example.org,email@example.com, firstname.lastname@example.org,email@example.com, 2. Copy this list to clipboard 3. Open a windows for composing a new mail. 4. Try to paste a list of emails from clipboard to "To:" (or "Reply-to" etc.) field Actual results: 5. After that you can find that all "email1" (exluding first line) contain comma it the begining: firstname.lastname@example.org email@example.com firstname.lastname@example.org ,email@example.com firstname.lastname@example.org ,email@example.com firstname.lastname@example.org email@example.com firstname.lastname@example.org So, Thunderbird thinks that ",email@example.com" and ",firstname.lastname@example.org" are incorrect emails Expected results: The correct list should be: email@example.com firstname.lastname@example.org email@example.com firstname.lastname@example.org email@example.com firstname.lastname@example.org email@example.com firstname.lastname@example.org email@example.com It is very urgent bug for me. Please, fix it!
Try changing the editor.singleLine.pasteNewlines pref (I don't recall details of which number is what)
Thank you, seems that changing editor.singleLine.pasteNewlines from 4 to 3 helped to solve the problem!