I found out that if a file has an extra dot before the extension, e.g. book1..xls
if you have "hide known file extensions" enabled in Folder Options), then the following will occur. If you right click the file, click Send to, click Mail Recipient, a new mail window opens up with the attachment of the file RENAMED TO book1._xls
. I.e. the extra dot is replaced with an underscore.
Also, the funny thing is if there are additional dots before the extension, only the 2nd, 4th, 6th, etc. dots will be replaced with underscores.
That means if the dot JUST BEFORE the extension is in an even-number position (counting from left to right), it will be replaced with "_", making the file extension looking like "_xls" and thus the attachment will be unopenable by your recipient unless he or she manually deletes the undercore from the extension.
will become book1._.xls
; file name changed but still openable.
will become book1._._xls
; file becomes unopenable.
This does not happen in Outlook Express. It seems to only happen with Windows Live Mail. Anyone can easily recreate this phenomenon. So am I the first one who discovered this? This has to be a bug, right?