send emails to group of users in CCn

Hello to all.
I need an advice. I’m stuck. I have a spreadsheet with 100 email addresses of suppliers I source from, divided into 3 categories (example: beer suppliers, wine suppliers, water suppliers). Can I send an email, by group of suppliers, without the suppliers address being visible? So, if I choose the category “Beers”, how can I send an email to all the addresses linked to this specific group in CCn (or other blind way)?
Thanks a lot to those who can help me. I went into crisis on this aspect.
Matteo

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Steve
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