short e-mails

[sipapu]

Using WIN XP with Firefox for e-mail. Some of my e-mail opens to enable reading the entire page; either due to a single page in length or by using the scroll bar. From time to time I get an e-mail cut off at the bottom (see attachment). Note the scroll bar will go down no further.The only way I can read the last few lines is to open it in Reply. For example the attachment has a button at the bottom to delete spam but I cannot do so without putting the message in Reply.