because got the message "...message exceeds mailbox limits..."
Try sending the e-mail with attachments via your yahoo.com address - you should be able to do it from there! If you still have problems, unclick the "Save copy" box & send it without keeping a copy. Before sending, save by copy/pasting the e-mail to your Documents folder!!
The alternative would be to go into a photo edit program & "re-size" the 'gif's' 'tif's' to under 500 Kb THEN load them onto your e-mail.
ONCE AGAIN, may we strongly advise against putting copies of personal & sensitive information up on to a PUBLIC notice board like this. MANY rogues visit these forums & could easily pass themselves off as YOU when dealing with the companies you have previously refered to. ~ Grahame.