Tickets :: Comment on [#9245] MIME type of application/octet-stream attachments is no longer guessed

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Comment	> For compose attachments? Yes we do, in the compose_attach hook. > > For message attachments? Yes we do, in IMP_Contents::getSummary(). > Although we only do filename guessing - it is too expensive for us to > have to download the entire contents of a potentially very large file > from the IMAP server to do a fileinfo-type guess. Although I guess > we could now leverage the power of the IMAP server and only download > a certain portion of the file (i.e. first 1000 bytes) to do fileinfo > guessing, although I don't know enough about the heuristics to know > if it only does scanning at the beginning of data.
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