If I reduce the number of lines in a.txt down to 10M it is still larger than 25M bytes on the wire so not cached and always fetched from imap. If I reduce it to 7M lines it is less than 25M bytes on the wire so it is cached. I sent the message to gmail account and in both cases with trunk build I see the attachment size but it is the actual file size and not the "wire" size transferred via imap. However, when I check gmail on 60.8 I see the "size unknown" but the attachments still seem to be downloadable. Note: Each line of the a.txt is just a 'y' character, not 'yes' as seems to be implied in comment 5.
Bug 1576584 Comment 18 Edit History
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If I reduce the number of lines in a.txt down to 10M it is still larger than 25M bytes on the wire so not cached and always fetched from imap. If I reduce it to 7M lines it is less than 25M bytes on the wire so it is cached. I sent the message to gmail account and in both cases with trunk build I see the attachment size but it is the actual file size and not the "wire" size transferred via imap. However, when I check gmail on 60.8 I see the "size unknown" but the attachments still seem to be downloadable. Note: ~~Each line of the a.txt is just a 'y' character, not 'yes' as seems to be implied in comment 5.~~ Never mind, I see what cmd 'yes' does now.