Forum Moderators: open
What you're asking is for CR/LF characters to appear on screen (in the email), but to be 'invisible' when a user copy 'n' pastes - kind of like a soft-hyphen-ish? Hhhmmmm, is there a magic character that can do this?!
Alternatively, you could just make the big URL much smaller and send a TinyURL(.com) ...?