OK thanks SBR :)
No > characters came up in the email for me. But if it was an answer that you received by email, it could be > character that is used for quoting other sources. On here it would look like:
A quotation from someone
But in the email it would probably show as
> A quotation from someone
It could have also been an answer that was converted to a comment. Do you have a link of the actual comment on the site?
Edit: OK you did say "it shows all the comments", which as far as I know does not happen with our emails. Maybe your email program grouped several messages together and that's where the > came from.