User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.82 Safari/537.36 Steps to reproduce: Trying to reply an email that consists address From: "Dmitry @ BRANDNAME" <d@BRANDNAME.ru> There's no Reply-to: field in header. ps. Real brand name replaced to BRANDNAME Actual results: Thunderbird converts name and email address to: To: "Dmitry@BRANDNAME"@BRANDNAME.ru Expected results: Reply should be addressed to "Dmitry @ BRANDNAME" <d@BRANDNAME.ru>

Wrong data. ___ Steps to reproduce: Trying to reply an email that consists address From: "Dmitry @ BRANDNAME_A" <d@BRANDNAME_B.ru> There's no Reply-to: field in header. ps. Real brand names are replaced to BRANDNAME_A and BRANDNAME_B Actual results: Thunderbird converts name and email address to: To: "Dmitry@BRANDNAME_Ad"@BRANDNAME_B.ru Expected results: Reply should be addressed to "Dmitry @ BRANDNAME_A" <d@BRANDNAME_B.ru>

I thought this one could be a duplicate of bug 1092631. However they are different. That last bug is about separating recipients with ";". This bug is about the recipient name including a "@". However, Thunderbird does some strange transformation with the "To:" field.