cannot delete attachment file with multibyte UTF8 name
Hi,
I'm using Thunderbird with Courier-IMAP server. When I upgrade Courier-IMAP to 5.0.x, an attachment file with UTF-8 filename cannot delte with error:
"WRITE: ## NO [ALERT] Your IMAP client does not appear to correctly implement Unicode messages, see https://tools.ietf.org/html/rfc6855.html"
Because Thunderbird add a mime-part with delete comment like: <<<<< BEGIN >>>>>
B9BFA3413B08F1FAB3A2AAC0
Content-Type: text/plain; charset=UTF-8; x-mac-type="0"; x-mac-creator="0";
name="=?UTF-8?B?44OG44K544OILnR4dA==?="
Content-Transfer-Encoding: base64 Content-Disposition: attachment;
filename*=utf-8%E3%83%86%E3%82%B9%E3%83%88%2E%74%78%74
44OG44K544OI <<<<< END >>>>>
I'm not sure this part is violate RFC or not. And I also ask Courier-IMAP developper.
Best regards,
Alle Antworten (1)
Sorry, I copied attachment Mime-part of original above. When I remove attachment, Thunderbird try to save a new message which have raw text in MIME header like:
5F5AD0058999A55C70504EF7
Content-Type: text/x-moz-deleted; name="Deleted: テスト.txt" Content-Transfer-Encoding: 8bit Content-Disposition: inline; filename="Deleted: テスト.txt" X-Mozilla-Altered: AttachmentDeleted; date="Sun Dec 02 12:15:08 2018"
You deleted an attachment from this message. The original MIME headers for the attachment were: Content-Type: text/plain; charset=UTF-8;
name="=?UTF-8?B?44OG44K544OILnR4dA==?="
Content-Transfer-Encoding: base64 Content-Disposition: attachment;
filename*=utf-8%E3%83%86%E3%82%B9%E3%83%88%2E%74%78%74
5F5AD0058999A55C70504EF7--
And Courier-IMAP 5.0.x rejects the replacement message.
I also ask about this bug to Courier-IMAP deveropper. Please refer:
https://sourceforge.net/p/courier/mailman/message/36481538/
Best regards,