Judging from the URL of those links, those images were hosted on a domain that you could access, but others could not, namely they were stored as Gmail image attachments, to which of course you as the recipient have access, but random LessWrong users do not.
Yep, fixed. Thank you!
Judging from the URL of those links, those images were hosted on a domain that you could access, but others could not, namely they were stored as Gmail image attachments, to which of course you as the recipient have access, but random LessWrong users do not.