Closed Bug 1507177 Opened Last year Closed Last year
Thunderbird corrupts msword files (.doc and .docx)
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:63.0) Gecko/20100101 Firefox/63.0 Steps to reproduce: MacOS 10.11.6 Office Word for MAC 2011 Since the installation of Thunderbird 60.3. (09.Nov.2018) attached word files (.doc and .docx) are corrupted. They cannot be opened in WORD - instead offer different converters in a separate small window. Servers from companies refuse the mail alltogether. (Diagnostic-Code: smtp;554 5.6.0 Corrupt message content; STOREDRV.Deliver.Exception:ConversionFailedException.MimeException; Failed to process message due to a permanent exception with message The message content has become corrupted. MimeException: MIME content error: Wrong magic number in Apple MIME attachment. [Stage: PromoteCreateReplay]) All other formats work fine – rtf, jpg, pdf, txt etc.- doc or .docx with zip works also fine doc. and docx. files from Thunderbird 52 to Tunderbird 60.3 can be opened without problem Actual results: mimeTypes.rdf deleted: no solution Virus Scanner disabled and removed: no solution In the corrupted .doc attachments the correct mime type „application/msword“ is replaced by mime type „multipart/appledouble“ or is deleted entirely. The previous version Thunderbird 52 on a second MacBook works absolutely fine. The problem occurs with all four different mail accounts under Thunderbird 60.3. Expected results: The mime encoding seems not working properly.
Looks like for some reason we don't understand yet, TB 60 sends the documents in Apple-double format (when TB 52 didn't do that). We haven't been able to reproduce this but we're thinking about complete removal of Apple-double encoding in bug 1506800.
Status: UNCONFIRMED → RESOLVED
Closed: Last year
Resolution: --- → DUPLICATE
Duplicate of bug: 1506800
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