People receiving my email have started getting odd symbols such as a raised
2 instead of quote marks and EUR instead of bullets (option 8). Can you help
me please?
There's most likely nothing wrong on your end --and possibly nothing wrong
on the recipients' either.
Some mail servers --notoriously the AOL ones but also a whole bunch of
other ones-- mangle many characters above ASCII 127, such as bullets,
typographer's quotes (as opposed to straight typewriter quotes), letters
with diacritics (accented vowels, dieresis, tildes, etc.).
The solution is to use an asterisk instead of a bullet, straight quotation
marks, etc.