I have seen some strange text in some Facebook comments

Some random comment made by a user followed by some machine generated tag

[cid:[email protected]]

While searching for such pattern in Google, I found that some Flickr photos are also titled in the same pattern.

I think this format is inserted when you reply the FB comments by e-mail and there is an image as signature, but I don't even know if it is possible.

1 Answer 1


Is it possible to comment using e-mail. When someone has an image signature, the e-mail client can insert this code to refer the image.


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