OS: Win2K Build 1.4b Whenever a friend of mine replies to my e-mails in UTF-8, Mozilla fails to parse the From: field of his emails. I'm not sure what mail client he uses. When he sends messages in iso-8859-1 the header looks like: From: "Polyanovskyi, Sasha" <fake@email> When sent as UTF-8 the same header looks like this: From: =?UTF-8?B?UG9seWFub3Zza3lpLCBTYXNoYQ==?= <fake@address> Mozilla seems to break this UTF-8 header in 2 parts and mis-handles it in the following ways: 1. In the threadpane shows Sender as: Polyanovskyi 2. In message pane shows From: field as: Sasha <fake@address> 3. When replying to such email, in Composition window Mozilla puts To: fields one of which is "Polyanovskyi" and another one "Sasha <fake@address>" Ofcoarse when such composed message is sent, the "Polyanovskyi" addressee bounces (very annoyingly), and the second one goes through. None of this happens with iso-8859-1 header. Interestingly, when opening this saved message in the browser, it seems to handle the From: field correctly. I'm attaching the troublesome message.

For those wondering about inconsistencies, in the examples and testcase I replaces his real e-mail address with a fake one.

I have yet to check RFC 2047 and RFC 822, but this is not likely to be Mozilla's fault. The following is From: =?UTF-8?B?UG9seWFub3Zza3lpLCBTYXNoYQ==? <fake@address> decoded to From: Polyanovskyi, Sasha <fake@email> which is different from From: "Polyanovskyi, Sasha" <fake@email> Can you see the difference? Without quotatin marks, a bare comma is exposed separating your friend's family name from the rest of the address. Stupid 'Internet Mail Service (5.5.2650.21)' apparently omitted quotation marks when RFC-2047-encoding your friend's name in the form of 'last name, firstname'. Moreover, there's no need to RFC-2047-encode it because it's all ASCII. A work-around is to ask your friend to write his/her name 'firstname lastname' without a comma (that is 'Sasha Polyanovskyi').

(In reply to comment #3) > The following is > > From: =?UTF-8?B?UG9seWFub3Zza3lpLCBTYXNoYQ==? <fake@address> > > decoded to > > From: Polyanovskyi, Sasha <fake@email> > > which is different from > > From: "Polyanovskyi, Sasha" <fake@email> > > Can you see the difference? Without quotatin marks, a bare comma is exposed > separating your friend's family name from the rest of the address. As discussed at the dupe, Mozilla is in fact misinterpreting the spec -- RFC2047 encoded words are supposed to be handled as atoms -- that is, embedded commas were supposed to be parsed *prior* to decoding. *** This bug has been marked as a duplicate of 254519 ***