Why do SOME email first appear in normal format then quickly change to one long line starting from t

They initially look like typical yahoo email letters several lines long then 2 seconds later its one long line going on & on if I keep scrolling to the right. I also have a problem filing some emails. Instead of going into my personal or school files I will get an advertisement for online colleges or a dating service. I use McAffee, scan frequently, don't open bulk. Help is this some sort of worm??

Why do SOME email first appear in normal format then quickly change to one long line starting from the left??auto protect

Kaspersky Internet Security 2011 keeps your PC free from malicious code, adware, spyware, hacker attacks, spam and network fraud.

if you go to your options you can change how many characters you allow per line

Why do SOME email first appear in normal format then quickly change to one long line starting from t

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